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Classifying

AN G LE S

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SYMBOLS

$congruent symbol means 2items have the samemeasure CON

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Acute Angles

A n acute angle is an angle measuring between 0 and 90 degrees.T he following angles are all acute angles.

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Ri ght AnglesA ri ght angle is an angle measuring 90degrees.T he following angles are both right angles.

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Ob tuse Angles

A n ob tuse angle is an angle measuring between 90 and 180 degrees.T he following angles are all obtuse.

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S tra i ght AngleA st r a ight angle is 180 degrees.

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V ert i cal AnglesV er t ical Angles form an X

12

43

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Adjacent, S upplementary, and

Complementary Angles

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A djacent angles are side by sideand share a common ray.

1 2

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T hese are examples of adjacent angles.

55

35

5 013 0

80 45

8520

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T hese angles are NO

T adjacent.

4555

5 0100

35

35

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S upplementary angles add up to180.

6 0120

4 0

14 0

Adjacent and Supplementa ry Angles Supplementa ry Anglesb ut n o t Adjacent

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C omplementary angles add up to90.

6 0

3 0 4 05 0

Adjacent and Co

mplementa ry Angles Co

mplementa ry Anglesb ut n o t Adjacent

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G AME TIME!T he object of the game is to be

the first to r a ise yo ur hand andcorrectly name what type of

angle you see .T he c o rr ect answe r w ill b e o n the

f o llo w ing sl ide!!G oo d luck!

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D irections: Identify each pair of angles as vertical,

supplementary,

complementary,or none of the above.

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# 1

6 0120

vertical, supplementary, complementary,or none of the above.

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# 1

6 0120

Supplementa ry Angles

vertical, supplementary, complementary,or none of the above.

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#2

6 03 0

vertical, supplementary, complementary,or none of the above.

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#2

6 03 0

C o mplementa ry Angles

vertical, supplementary, complementary,or none of the above.

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#3

75

75

vertical, supplementary, complementary,or none of the above.

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#3

75

75

V er t ical Angles

vertical, supplementary, complementary,or none of the above.

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#4

6 04 0

vertical, supplementary, complementary,or none of the above.

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#4

6 04 0

N o ne o f the a bov e

vertical, supplementary, complementary,or none of the above.

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#5

6 0

6 0

vertical, supplementary, complementary,or none of the above.

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#5

6 0

6 0

V er t ical Angles

vertical, supplementary, complementary,or none of the above.

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#6

45135

vertical, supplementary, complementary,or none of the above.

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#6

45135

Supplementa ry Angles

vertical, supplementary, complementary,or none of the above.

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#7

6 5

25

vertical, supplementary, complementary,or none of the above.

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#7

6 5

25

C o mplementa ry Angles

vertical, supplementary, complementary,or none of the above.

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# 8

5 090

vertical, supplementary, complementary,or none of the above.

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# 8

5 090

N o ne o f the a bov e

vertical, supplementary, complementary,or none of the above.

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D irections: D etermine the missing

angle.

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# 1

45?

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# 1

45135

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#2

6 5

?

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#2

6 5

25

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#3

35

?

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#3

35

35

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#4

5 0

?

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#4

5 0

130

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Acute Angle

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Obtuse Angle

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Ri ght Angle

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G R EAT J OB !