Question

Instructions: Find the missing length indicated.

Answer 1

X = 20

Explanation:

To get the answer, we can set this up like a ratio.

First, we need to get the missing side of the small triangle. Using
`a^(2) +b^(2) = c^(2)` we get
`9^(2) +b^(2) =15^(2)`

`9^(2) +b^(2) =15^(2)` square

`81 +b^(2) = 225` subtract 81 from 225

`b^(2) =144` square root

`b=12`

Set up a ratio:

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

`(3)/(5) =(12)/(x)\\3x=60\\x=20`