Q. 1. Recall that two circles are congruent if they have the same radii. Prove that equal chords of congruent circles subtend equal angles at their centres. Ans:

Q. 2. Prove that if chords of congruent circles subtend equal angles at their centres, then the chords are equal.

Ans:

NCERT Solutions For Class 9 Maths Chapter 10, Circles (All Exercises)