Question

Find the value of x to the nearest kilometer

x
21.5km
27km
a: 2km
b: 7km
c: 16km
d: 267km​

Answer 1

C 16 km

Explanation:

Pythagoras

c² = a² + b²

c being the Hypotenuse (the side opposite of the 90° angle), a and b are the legs.

in our case that is

27² = 21.5² + x²

729 = 462.25 + x²

x² = 266.75

x = sqrt(266.75) = 16.33248297... km ≈ 16 km