1. Warm-up: Get everything out of your folders!1. 75 9

2. 7.2 Use the Converse of the Pythagorean Theorem
Use the converse to determine if a triangle is a right triangle

3. Theorem 7.2 If a2 + b2 = c2, then the triangle is a right triangle. c

4. Example 1: A. 23 11 20 B. 10 8

5. Theorem 7.3
If c2 < a2 + b2, then the triangle is an acute triangle. c b a

6. Theorem 7.4
If c2 > a2 + b2, then the triangle is obtuse. b a c

7. Example 2
Can segments with length 11.2 in, 6.5 in and 7.1 in form a triangle? If so, would the triangle be acute, right or obtuse?

8. Example 3 Tell whether the following triangles are right triangles:
4, 8,
10, 11, 14
5, 6,

9. Example 4:
Example 5:

10. Example 6:
On the next slide you will find a multi-step word problem. One a separate piece of paper:
Put your name, date and period
Complete the problem showing all of your work
This will count as a quiz grade! 15 points
When you are done, start your home on the side board.

12.  Homework 
Pg. 444 — 447 (1, 3, 6, 15, 16, 23, 26)