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Circle Theorem: A Tangent Meets a Radius at 90° (Mathematics Lesson)

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.

Real Examples of How to Use the Circle Theorem that a Tangent Meets a Radius at 90°

The slider below shows real examples which use the circle theorem that a tangent meets a radius at 90°:
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Note
WHAT IS A CIRCLE?

A circle is a shape containing a set of points that are all the same distance from a given point, its center.

CIRCLE THEOREMS

Circle theorems relate to the angles and lines within circles.

That a tangent meets a radius at 90° is one of the circle theorems. There are several others.

Read more about circle theorems