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Please help me! I don't understand this at all!

Please help me! I don't understand this at all!-example-1
User Utogaria
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1 Answer

6 votes
bearing in mind, that T is tangent to the circle, thus, the point of tangency with a radius or diameter, is always at right-angle

thus, notice the picture below
Please help me! I don't understand this at all!-example-1
User Gokul E
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