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.
2. Prove that if chords of congruent circles subtend equal angles at their centres, then
the chords are equal.
Answer:
ഗജിസ് ഹസ്ബജ്സ്വ് ജബ്ഞെബെൻ ഹഷസ്ബസ്ജ്