This document discusses different types of triangles, including acute, right, obtuse, scalene, and isosceles triangles. It specifically focuses on special right triangles, describing the 30-60-90 and 45-45-90 right triangles through examples and assigning groups to solve for unknown sides of these triangles. As homework, students are asked to practice solving 30-60-90 and 45-45-90 right triangles.

1. Triangles

2. Recall: Types of Triangle

3. What are the major types of
triangle?
Acute
Right
Obtuse

4. What are the special types of
triangle?
Scalene
Isosceles

5. Observe the triangles below and
name its type:
Scalene
Right
Triangle
(30-60-90)
Isosceles
Right
Triangle
(45-45-90)

6. Special Right
Triangle

7. What are special right
triangles?

8. 30-60-90 Right Triangle

9. Example 1:

10. 45-45-90 Right Triangle

11. Example 2:

12. What are special right
triangles?

13. Group Activity
Divide class into 4 groups then answer the
unknown sides of the assigned triangle.
Time allotment: 10 minutes

14. Homework:
1 2

15. 30-60-90 Right Triangle

16. 45-45-90 Right Triangle