isosceles
Hello, reshma!
1. are points on the circle.
is an isocelels triangle with , and angle bisector of meets circle at
If and is extended to meet at , show that:
Since
Since
Let
. . Then: .
is an inscribed angle.
. . It is measured by: .
is formed by two secants.
. . It is measured by:
Hence: . , and is isosceles.
Therefore: .