1. 8.1: Geometric Mean Day 2

2. Warm-Up 1. Find the geometric mean between 9 and 13.

3. 8.1: Geometric Mean Day 2

4. Batman & Robin always start at the right angle of the LARGE triangle!
𝑥 2
=2*8
𝑥 2 =16
𝑥=4 x 2 6
They are going to save 3 people….along the hypotenuse!

5. 8 2
=x*10
64=10𝑥
64 10 =𝑥
32 5 =𝑥 8 x 10

6. 𝑦 2
=3*6
𝑦= 18
𝑦= 9∗2
𝑦=3 2 y 3 9

7. CD = 12, AD = 16, Find DB.
12 2 =
16*x
144=16𝑥 =𝑥
9=𝑥

8. AC = 40, AD = 32, Find AB.
40 2 =
32*x
1600=32𝑥 =𝑥
50=𝑥

9. 8*x 8*(8+x) 14 2 = 14 2 = 196=8𝑥 196=64+8𝑥 CB = 14, DB= 8, Find AD.
196 8 =𝑥
196=64+8𝑥
49 2 =𝑥
132=8𝑥
132 8 =𝑥
AD=
33 2 =x
AD= 33 2

10. Practice
8.1 Worksheet