1. Objective: Use Pythagorean theorem.

3. Example 1

4. Example 2 Find the length of the missing side. Round to the nearest tenth. a. b.

5. Example 3 Find each missing length. a. b.

6. Investigation:

7. Classwork Pythagorean theorem-worksheet

8. Objective: Use Pythagorean theorem. Warm up 1. The vertices of trapezoid PHAT lie on a circle, as shown. Trapezoid PHAT has a height of 12 centimeters and the length of is 20 centimeters. If the area of PHAT is 300 square centimeters, what is the approximate area of the shaded region?