Angle subtended by a chord at any point on the are are equal
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let two triangles of circle from centre o
name them as triangleAOB and triangleDOC
then OC=OB (radius)
,OA=OD (radius)
AB=DC (given)
by sss congruency AOB congruent DOC
Angle AOC=DOC by cpct
name them as triangleAOB and triangleDOC
then OC=OB (radius)
,OA=OD (radius)
AB=DC (given)
by sss congruency AOB congruent DOC
Angle AOC=DOC by cpct
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