1. Find the geometric mean between: 1.6 and 20 2.15 and 20 Geometric Mean x is the geometric mean between a and b. a x x b = Warm-up!!

2. 6 and 20 x 2 = 120 x  11.0

3. 15 and 20 x 2 = 300 x  14.1

5. The altitude to the hypotenuse of a right triangle divides the triangle into two triangles that are similar to the original and to each other.

6. A C D E A C E medium A CD large A DE small h k r g m r m h g + k h k r g m or

7. Continue for practice problems

8. y 2 = 72 x 2  152.73

9. x y 3 4 D A B C y 2 = 12 x 2 = 28

10. 4x = 4y 2 = 20

11. 20x = 100 y 2 = 75 20 10 x y