Question

URGENT - Find diameter of the circle shown below

Answer 1

Answer: 10.392

Explanation:

Using cosine rule:
9^2 = r^2 + r^2 - 2(r)(r) x cos(120)
81 = 2r^2 - 2r^2 x cos(120)

r = 5.196 (calculator used)

d = 2r

d = 2(5.196)

d = 10.392