Question

Calculate the length x.
Give your answer to 2 s.f.
see photo:

Answer 1

9.2 cm

Explanation:

Angles of a triangle add up to 180°, so the third angle is:

60° + 47° + y = 180°

y = 73°

Using law of sines:

a / sin A = b / sin B

x / sin 47° = 12 / sin 73°

x = 9.2