Proof That Angles Subtended From the Same Chord in the Same Segment Are Equal

The indicated anglesin the diagram below are equal.

By drawing in the chord AB (below) the anglescan be seen to be in the same segment of the circle and subtended from the same chord.

The equality of the angles is then a consequence of the fact that(1)

This last is another circle theorem, proved here.

You have no rights to post comments