equal chords suntans equal angel at the center
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Given:AB=CD
To prove:Angle AOB=AngleCOD
Proof:Consider Triangle AOB&DOC
AB=CD/Given
AO=OD/radius
BO=OC/Radius
Triangle AOB=TRI..DOC/SSS(SIDE SIDE SIDE)
Angle AOB=DOC/CPCT
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