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If the line AD is a tangent to circle B, what is the measure of BCA?
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If the line AD is a tangent to circle B, what is the measure of BCA?

If the line AD is a tangent to circle B, what is the measure of BCA?-example-1
User CreativePS
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90°

Cuz,
Perpendicular dropped on the point when a tangent touches a circle from its centre make an angle of 90°
User Imanol
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