in the given figure o is the centre of a circle C (o,r) and PO bisects angle APC. Prove that AB=CD
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Answer:
Consider △OEP and △OFP
We know that
∠OEP=∠OFP=90
o
OP is common i.e. OP=OP
From the figure we know that OP bisects ∠BPD
It can be written as
∠OPE=∠OPF
By ASA congruence criterion
△OEP≅△OFP
OE=OF (c.p.c.t)
We know that AB and CD are equidistant from the centre
So we get
AB=CD
Therefore, it is proved that AB=CD
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