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

40º
50º
90º
180º


If Line AD Is A Tangent To Circle B What Is The Measure Of BCA 40º 50º 90º 180º class=

Sagot :

We have to find the measure of Angle BCA if line AD is a tangent to circle B. Then we have to choose the correct answer. Tangent line is a line that touches a circle at exactly 1 point. The tangent line ( here AD ) at point C is perpendicular to the radius ( here BC ) to that point. Therefore measure of Angle BCA is 90°. Answer: C. 90°.

Answer: 90

Step-by-step explanation: They are correct. I got it right on the test. Just confirming the answer.