Question

Could someone help me please?

Answer 1

a. 7.2

b. 6

Explanation:

Since the side lengths of similar polygons are proportional to each other, therefore:

`(b)/(10) = (9)/(15) = (a)/(12)`

Thus, let's find b using:

`(b)/(10) = (9)/(15)`

Cross multiply

`b*15 = 10*9`

`15b = 90`

Divide both sides by 15

b = 6

Let's find a using:

`(9)/(15) = (a)/(12)`

Cross multiply

9*12 = 15*a

108 = 15a

Divide both sides by 15

a = 7.2