When two secants intersect at a point in the exterior of a circle, the measure of the angle formed is one-half the positive difference of the measures of the two intercepted arcs.

Question

Quizplus · Accepted Answer

When two secants intersect in the exterior of a circle, the angle formed by the secants is equal to one-half the difference of the measures of the intercepted arcs. This is a fundamental theorem in circle geometry.

When Two Secants Intersect at a Point in the Exterior