39,235 views
16 votes
16 votes
Find side X give answer to 1dp

Find side X give answer to 1dp-example-1
User Alex Steinberg
by
2.8k points

1 Answer

22 votes
22 votes

Answer:

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

User Jeaf Gilbert
by
2.7k points