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If two equal chords of a …

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If two equal chords of a circle intersect within the circle ,prove that the segment of one chord are equal to corresponding segment of the other chord
  • 1 answers

Yogita Ingle 3 years, 11 months ago

Drop a perpendicular from O to both chords AB and CD

In △OMP and △ONP

As chords are equal, perpendicular from centre would also be equal.

OM=ON

OP is common.

∠OMP=∠ONP=90o

△OMP ≅ △ONP (RHS Congruence)

PM=PN                                               ......................(1)

AM=BM              (Perpendicular from centre bisects the chord)

Similarly ,CN=DN

As AB=CD

AB−AM=CD−DN

BM=CN                                                 .........................(2)

From (1) and (2)

BM−PM=CN−PN

PB=PC 

AM=DN                   (Half the length of equal chords are equal)

AM+PM=DN+PN

AP=PD

Therefore , PB=PC  and AP=PD is proved.

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