This is circle based question from Chapter name- circles

Topic – Angle properties of circles

Chapter number- 15

In the ques we have a circle ans , O is the centre of the given circle and OABC is a parallelogram

. BC is produced to meet the circle at D.

Now we have to Prove that ∠ABC = 2 ∠OAD.

ICSE Avichal publication

Understanding ICSE Mathematics

Question no 14

Solution: