This is circle based question from Chapter name- circles

Topic – Angle properties of circles

Chapter number- 15

In this question we have a figure in which ∆ABC is isosceles with AB = AC.

Now we have to prove that the tangent at A to the circumcircle of ∆ABC is parallel to BC.

ICSE Avichal publication

Understanding ICSE Mathematics

Question no 36

Solution:Given: ∆ABC is an isosceles triangle with AB = AC.

AT is the tangent to the circumcircle at A.