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Byju's Answer
Standard VII
Mathematics
RHS Criteria for Congruency
If ABC is an ...
Question
If ABC is an isosceles triangle with AB=AC and AD is an altitude, then
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Solution
In tringle ABD & ACD
AB=AC (GIVEN)
ANGLE ADB=ANGLE ADC(BOTH ARE RIGHT ANGLES)
AD=AD(COMMON)
SO BOTH THE TRIANGLES ARE CONGRUENT
THEREFORE BD=CD(CPCT)
ANGLE BAD=ANGLE CAD(CPCT)
HENCE AD BISECTS BOTH BC AND ANGLE A
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