Question

What is the value of x? Round your answer to the nearest Whole number

X
A 10
C 17
B 1
D 13

Answer 1

B

Explanation:

Using Pythagoras' identity in the right triangle

x² + 9² = 15²

x² + 81 = 225 ( subtract 81 from both sides )

x² = 144 ( take the square root of both sides )

x =
`√(144)` = 12 → B