Thread: circle geometry help

http://www.boardofstudies.nsw.edu.au...extension1.pdf

can someone help me with question 5c with explanations such as reasons

Hello andy69 [IMG]file:///C:/Users/janet/AppData/Local/Temp/moz-screenshot-8.png[/IMG]

Originally Posted by andy69

http://www.boardofstudies.nsw.edu.au...extension1.pdf

can someone help me with question 5c with explanations such as reasons

In the attached diagram, is a tangent at to the circle . We have to prove that is isosceles.

Proof

(vertically opposite)

(alternate segment)

(exterior angle of a cyclic quadrilateral)

is isosceles.

Grandad