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Line AD is a tangent to circle B at point C and m
What is the measure of
(The answer is 90 but how do you get this answer?)

Line AD is a tangent to circle B at point C and m What is the measure of The answer is 90 but how do you get this answer class=

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musiclover10045

BCA is 90 degrees, because a tangent line is perpendicular to the raduis line BC.

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