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GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By...

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GEOMETRY 4-1 Classifying Triangles
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Page 1: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

GEOMETRY 4-1Classifying Triangles

Page 2: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Acute Triangle

Three acute angles

Triangle Classification By Angle Measures

Page 3: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Right Triangle

One right angle

Triangle Classification By Angle Measures

Page 4: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Obtuse Triangle

One obtuse angle

Triangle Classification By Angle Measures

Page 5: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Equiangular Triangle

Three congruent acute angles

Triangle Classification By Angle Measures

Page 6: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Classify Each Triangle According to Angle Measure

Page 7: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Equilateral Triangle

Three congruent sides

Triangle Classification By Side Lengths

Page 8: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Isosceles Triangle

At least two congruent sides

Triangle Classification By Side Lengths

Page 9: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Scalene Triangle

No congruent sides

Triangle Classification By Side Lengths

Page 10: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Classify Each Triangle by Side Length

Page 11: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Find the length of each side.

3x - 2 5x - 4

4x - 2

Page 12: GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.

Example: Word Problem

• A steel mill produces roof supports by welding pieces of steel beams into equilateral triangles. Each side of the triangle is 18 feet long. How many triangles can be formed from 420 feet of steel beam?


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