Ex 9.1, 2
Prove that if chords of congruent circles subtend equal angles at
their centres, then the chords are equal.
Given: Two congruent circles C1 & C2
AB is the chord of C1
& PQ is the chord of C2
& AOB = PXQ
To prove: Chords are equal, i.e., AB = PQ
Proof:
In AOB & PXQ
AO = PX
AOB = PXQ
BO = QX
AOB PXQ
AB = PQ

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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