Point B is a point of tangency. Find the radius r of ☉C.

Point B is a point of tangency. Find the radius r of ☉C.

asked 2021-01-25
Point B is a point of tangency. Find the radius r of ☉C.

Answers (1)

Since point B is a point of tangency, then \(\displaystyle{A}{B}¯¯¯¯¯≅{B}{C}¯¯¯¯¯\). Hence, \(\displaystyle∠{B}\) is a right angle and \(\displaystyle△{A}{B}{C}\) is a right triangle. Using Pythagorean Theorem,

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