Tangent and radius: find the angle

An example figure from the Circle Generator.

A circle with center O, a radius OA labeled 6 cm and a tangent touching the circle at A; the angle between the radius and the tangent is labeled x — A circle with its center O and a radius from O to a point A on the circle, labeled 6 cm. A tangent touches the circle at A and runs on both ways, and the angle between it and the radius is labeled x with no right-angle mark, for the angle between a tangent and a radius.

Edit this figure Download PNG

Editing opens it in the Circle Generator with these settings, to change anything and copy or download your own.

Answer key

x = 90°

Free to use in your tests, worksheets, slides or anything else, no credit needed. Public domain under CC0 1.0. How to reuse our figures

More Circle examples

Make your own in the Circle Generator →