Question

Work out the length of QR????!
:)​

Answer 1

Explanation:

First, use law of SINES to find QS :

11.7 / sin 28 = QS / sin95

shows QS = 24.83 cm

Now use law of COSINES to find QR

QR^2 = 10.2^2 + 24.83^2 - 2 ( 10.2)(24.83) cos ( 110)

shows QR = 29.9 cm