Question

In PQR, P = 90°, Q = 40° and PR =9cm. Find the length of QR .​

Answer 1

QR = 14.00 cm to the neatest hundredth.

Explanation:

This is a right triangle with < P = 90.

So QR is the hypotenuse.

< Q is the angle opposite to the line PR.

sin Q = opposite/hypotenuse = PR/QR

sin 40 = 9/QR

QR = 9/sin40

= 14.002 cm.