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4 years ago

9

Two sidewalks are tangent to a circular park centered at P as shown. i need help with 13 a and b

1 answer:

sergey [27]4 years ago

5 0

13. a) Since AC and AB are tangents to the circle, we know that two tangents that meet at an external point are equal.
Hence, AB = AC; so, AB = 40 ft.

13. b) (20 + r)² = 40² + r²
400 + 40r + r² = 1600 + r²
40r = 1200
r = 30

Hence, the diameter is 60 ft.

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