1. GEOMETRY 4-1 Classifying Triangles

2. 4-1 Classifying Triangles By angle measures: Acute Triangle: 3 acute angles Right Triangle: 1 right angle Obtuse Triangle: 1 obtuse angle

3. Equiangular Triangle Three congruent acute angles Triangle Classification By Angle Measures

4. Classify Each Triangle According to Angle Measure

5. 4-1 Classifying Triangles By side length: Scalene Triangle: no congruent sides Isosceles Triangle: at least two congruent sides Equilateral Triangle: 3 congruent sides

6. Classify Each Triangle by Side Length

7. Find the length of each side. 3x - 2 5x - 4 2x –.5

8. 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 340 feet of steel beam?