Circle Theorem: A Tangent Meets a Radius at 90°

Circle Theorem: A Tangent Meets A Radius at 90°

The tangent to a circle makes 90° with the radius which it meets at the point at which it touches.

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The slider below shows real examples which use the circle theorem that a tangent meets a radius at 90°.

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See Also

What is a circle? What are the circle theorems?