Geometry Quiz Chapter 12.5 Theorems and Terms
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If two secants or chords intersect in the interior of a circle, then...
The measure of each angle formed is half the sum of the measure of its intercepted arcs.
If a tangent and a secant (or chord) intersect on a circle at the point of tangency, then...
Then the measure of the angle formed is half the measure of its intercepted arc.
If a tangent and a secant, two tangents, or two secants intersect in the exterior of a circle, then...
then the measure of the angle formed is half the difference of the measure of its intercepted arcs.