Question

Find side X give answer to 1dp

Answer 1

x = 10.8

Explanation:

We can use the law of sines to solve this problem

sin A sin B

--------- = ----------

a b

sin 81 sin 40

--------- = ---------

x 7

Using cross products

7 sin 81 = x sin 40

Solving for x

7 sin 81 / sin 40 =x

x=10.75599

Rounding to 1 decimal place

x = 10.8