Two equal circles intersect in 
and 
A straight line through 
meets the circles in 
and 
Prove that 
Join PQ,
PQ is the common chord of both the circles.
Thus,
arc PCQ = arc PDQ
∴ ∠QAP = ∠QBP
∴ QA = QB Proved.
13
Two equal circles intersect in and A straight line through meets the circles in and Prove that
Join PQ,
PQ is the common chord of both the circles.
Thus,
arc PCQ = arc PDQ
∴ ∠QAP = ∠QBP
∴ QA = QB Proved.