You can
put this solution on YOUR website!Assuming D is intersection of perpendicular bisector to AB
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CD is Perpendicular Bisector of AB,,,,,,,,,given
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AD = BD,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,def of perp bisector
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CD=CD,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,same line,,transitivity
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angle ADC =angle BDC,,,,,,,,,,,,,,,,,,,,,,,,,,def perpendicular
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triangle ADC congruent to triangle BDC,,,,,,S A S
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