Hello, bearej50!

Given: Isosceles Triangle is inscribed in a circle with base

Prove: If is any point on minor arc , then ray bisectsCode:A * o * * / \ * * / \ * * / o \ * / \ * / \ * * / o \ * * / \ * / \ B*- - - - - -o- - -*C * * * * * * * o P

Draw chords and .

Inscribed angle is measured by

Inscribed angle is measured by

Since .(the triangle is isosceles),

. . then .(equal chords subtend equal arcs).

Therefore: .