Question

Use the information given in the figure to find the length BC.

If applicable, round your answer to the nearest whole number.
The lengths on the figure are not drawn accurately.
A
85
41
B
D
0

Answer 1

66

Explanation:

First find AD:

AD² + 9² = 41²

AD² = 1681-61=1600

AD = √1600 = 40

Now find BD:

BD² + 40² = 85²

BD² = 7225-1600=5625

BD = √5625 = 75

BC = BD - 9 = 75 - 9 = 66