Question

1. Find the value of x to the nearest tenth

A. 19.2
B. 20.8
C. 21.3
D. 19.7

Answer 1

20.8

Explanation:

Use the Pythagoras's Theorem

12²-36²=
`(x)/(2)`²

144-36=
`(x)/(2)`²

108=
`(x)/(2)`²

Root both sides

√108=√
`(x)/(2)`²

`(x)/(2)`≈10.4

`(x)/(2)`·2=10.4·2

x=20.8