Find the geometric

mean between:

1. 4 and 92. 3 and 63. 6 and 204. 15 and 20

Geometric Mean

x is the geometric mean between a and

b.

a xx b

=

Similarity 8 Warmup

4 and 9

9x

x4

x2 = 36

x = 6

3 and 6

6x

x3

x2 = 1829x

23x x 4.2

6 and 20

20x

x6

x2 = 120304x

302x x 11.0

15 and 20

20x

x15

x2 = 3003100x

210x x 14.1

A

C DE

A

C E

mediumA

C D

largeA

DE

small

h

k

r

g

mr

m h

g + k

h

k

r

kr

rg

g

m

gm

mgk

kh

hkg

orHeartbeat Rabbit

Continue for practice problems

x

y

3

4

D

A B

C

4y

y3

y2 = 1212y

34y 32y

4x

x7

x2 = 2828x 72x

5.3y 3.5x

6y

y12

y2 = 72 72y

236y 26y

26

xx18

x2 152.73152.73x

36.12x

5.8y

x2

24

4x = 4 1x

4y

y5

y2 = 20

5*4x

52x 5.4x

x10

1020

20x = 1005x

15y

y5

y2 = 75

325y

35y

20

10

x

y

7.8y