1. LESSON 8: USING FORMULAS IN GEOMETRY Geometry

2. FORMULAS

3. EXAMPLE Find the perimeter of the triangle. 8 in.

4. YOUR TURN Find the perimeter of the rectangle: 145 cm 123 cm

5. EXAMPLE Find the length of the rectangle. 9 in.

6. YOUR TURN

7. EXAMPLE Find the area of the triangle. 3 ft 5 ft

8. YOUR TURN Find the area of a triangle with a hypotenuse of 17 millimeters and a side length of 15 millimeters.

9. EXAMPLE

10. YOUR TURN

11. HOMEWORK QUESTIONS

12. CORRECTING HOMEWORK Get your homework out so I can stamp it. Get your homework out so I can stamp it. If you do not have your homework complete, write your name on the board. If you do not have your homework complete, write your name on the board. Use red pen/pencil to correct. Use red pen/pencil to correct. Trade with someone who has the homework done. Trade with someone who has the homework done. If you didn’t get it done, you need to be working on finishing it now. Remember no cheating and no work = no credit. If you didn’t get it done, you need to be working on finishing it now. Remember no cheating and no work = no credit. Make sure you write CB with your name or you will lose your citizenship points for today. Make sure you write CB with your name or you will lose your citizenship points for today.

13. HOMEWORK 1 st and 2 nd hour: Lesson 8: b, c, e-I, 3-8, 13-25, 27-30 1 st and 2 nd hour: Lesson 8: b, c, e-I, 3-8, 13-25, 27-30 3 rd hour: Lesson 8: b, c, e-I, 6, 7, 14, 15, 16, 19, 22, 29 3 rd hour: Lesson 8: b, c, e-I, 6, 7, 14, 15, 16, 19, 22, 29