Angles in Letters

By Keith Harbison

AcuteThis is an acute angleThe angle of this must be less than 90 degrees

Right Angel

This is a right angle The angle must be equal to 90 degrees

Obtuse

This angle is obtuse This means that the angle must measure more than 90 degrees but less than 180

Straight Angle

This angle is straight Straight angles must measure to 180 degrees

Complementary Angle

This is a complementary angle This means that the two angles added together will equal 90 degrees

Supplementary AngleThis is a supplementary angle Supplementary angles have two parts that add together to equal 180 degrees

Bisected Angle

This is a bisected angle On these both parts of the angle must be equivalent to each other

Vertical Angle

This is a vertical angleThis means that the two angles meet at a certain point and the angles directly across from each other must be equal

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

AcuteThis is an acute angleThe angle of this must be less than 90 degrees

Right Angel

This is a right angle The angle must be equal to 90 degrees

Obtuse

This angle is obtuse This means that the angle must measure more than 90 degrees but less than 180

Straight Angle

This angle is straight Straight angles must measure to 180 degrees

Complementary Angle

This is a complementary angle This means that the two angles added together will equal 90 degrees

Supplementary AngleThis is a supplementary angle Supplementary angles have two parts that add together to equal 180 degrees

Bisected Angle

This is a bisected angle On these both parts of the angle must be equivalent to each other

Vertical Angle

This is a vertical angleThis means that the two angles meet at a certain point and the angles directly across from each other must be equal

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

Right Angel

This is a right angle The angle must be equal to 90 degrees

Obtuse

This angle is obtuse This means that the angle must measure more than 90 degrees but less than 180

Straight Angle

This angle is straight Straight angles must measure to 180 degrees

Complementary Angle

This is a complementary angle This means that the two angles added together will equal 90 degrees

Supplementary AngleThis is a supplementary angle Supplementary angles have two parts that add together to equal 180 degrees

Bisected Angle

This is a bisected angle On these both parts of the angle must be equivalent to each other

Vertical Angle

This is a vertical angleThis means that the two angles meet at a certain point and the angles directly across from each other must be equal

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

Obtuse

This angle is obtuse This means that the angle must measure more than 90 degrees but less than 180

Straight Angle

This angle is straight Straight angles must measure to 180 degrees

Complementary Angle

This is a complementary angle This means that the two angles added together will equal 90 degrees

Supplementary AngleThis is a supplementary angle Supplementary angles have two parts that add together to equal 180 degrees

Bisected Angle

This is a bisected angle On these both parts of the angle must be equivalent to each other

Vertical Angle

This is a vertical angleThis means that the two angles meet at a certain point and the angles directly across from each other must be equal

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

Straight Angle

This angle is straight Straight angles must measure to 180 degrees

Complementary Angle

This is a complementary angle This means that the two angles added together will equal 90 degrees

Supplementary AngleThis is a supplementary angle Supplementary angles have two parts that add together to equal 180 degrees

Bisected Angle

This is a bisected angle On these both parts of the angle must be equivalent to each other

Vertical Angle

This is a vertical angleThis means that the two angles meet at a certain point and the angles directly across from each other must be equal

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

Complementary Angle

This is a complementary angle This means that the two angles added together will equal 90 degrees

Supplementary AngleThis is a supplementary angle Supplementary angles have two parts that add together to equal 180 degrees

Bisected Angle

This is a bisected angle On these both parts of the angle must be equivalent to each other

Vertical Angle

This is a vertical angleThis means that the two angles meet at a certain point and the angles directly across from each other must be equal

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

Supplementary AngleThis is a supplementary angle Supplementary angles have two parts that add together to equal 180 degrees

Bisected Angle

This is a bisected angle On these both parts of the angle must be equivalent to each other

Vertical Angle

This is a vertical angleThis means that the two angles meet at a certain point and the angles directly across from each other must be equal

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

Bisected Angle

This is a bisected angle On these both parts of the angle must be equivalent to each other

Vertical Angle

This is a vertical angleThis means that the two angles meet at a certain point and the angles directly across from each other must be equal

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

Vertical Angle

This is a vertical angleThis means that the two angles meet at a certain point and the angles directly across from each other must be equal

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

Linear Pair

This shows an example of a linear pairA linear pair is two lines that intersect each other and both sides add up to 180 degrees

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20

Bibliography

bull httpwwwgrahamsweetcomlettersgiant-polystyrene-letters-1jpg

bull httpecximages-amazoncomimagesI316zT-UzmcLjpg

bull httpecximages-amazoncomimagesI31MT9AXPH7L_SL160_AA160_jpg

bull httpwwwamazoncomgpproductimagesB001CM7ZASsr=1-11qid=1222645372ref=dp_image_0ie=UTF8ampn=3375251amps=sporting-goodsampqid=1222645372ampsr=1-11

bull httpimagesgooglecomimgresimgurl=httpfarm3staticflickrcom21252190805567_525a0bb23ejpg3Fv3D0ampimgrefurl=httpflickrcomphotoswhiteshadowphotography2190805567amph=375ampw=500ampsz=56amptbnid=v8BdaZa9GxxuGMamptbnh=98amptbnw=130amphl=enampei=OBjgSIm7GYjihAKg2OzzDQampsig2=_rATV0UZSV7h-Bya-wcPwQampum=1ampprev=images3Fq3DGiant2Bletter2B2522X252226start3D2026ndsp3D2026um3D126hl3Den26sa3DNampframe=small

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+22I22ampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+Eampstart=20ampsa=Nampndsp=20

bull httpimagesgooglecomimagesq=letter+xampbtnG=Search+Imagesampum=1amphl=enampsa=2

bull httpimagesgooglecomimagesum=1amphl=enampq=letter+tampstart=20ampsa=Nampndsp=20