Theorem 7.2 : Angles opposite to equal sides of an isosceles triangle are equal.
Text Solution
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In `/_\BAD` and `/_\CAD`
`AB=AC` given
`/_BAD=/_CAD` by construction
`AD=AD` common
By SAS congruence rule,
`/_\BAD` and `/_\CAD` are congruent.
Thus,
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