Question

What is the value of d?


Round your answer to the nearest tenth.

Answer 1

Answer: 11.9

Explanation:

I took the test

Answer 2

11.9 mm

Explanation:

We can find d by applying the cosine rules.

d² = 21² + 27² - 2(21)(27) cos (25)

d² = 441 + 729 - 1027.75

d² = 142.25

d = √142.25

d = 11.9 mm (nearest tenth)