1. Area and Perimeter
Triangles

2. Different Triangles
Scalene – all 3 sides have different lengths (measures) A B C
Isosceles – 2 of the 3 sides have the same length (measures)
A A
Equilateral – all 3 sides have the same lengths (measures)
A A

3. Formulas

4. Scalene Triangle Example 1:
4 in in
3 in

5. Scalene Triangle Your Turn:
6 in in
3 in

6. Isosceles Triangle Example 2:
10 cm cm
8 in
12 cm

7. Isosceles Triangle Your Turn:
8 cm cm
6 in
10 cm

8. Equilateral Triangle Example 3:
16.4 cm 16.4 cm 16.4 cm 7.9 cm

9. Equilateral Triangle You Turn:
20 cm 20 cm 20 cm 8 cm

10. Assignment
Area, Perimeter, and Classification of Triangles