if triangleABC is an isoscels triagle which is right angled at anglec=90 then AB square is
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=>in triangle ABC
=>AB = AC
=> therefore, Angle B = Angle C
=> let angle b and angle c = x
=> now,
=> A + B + C =180
=> x + x + 90 = 180
=> 2x = 90
=> x = 45
there B = 45
=>AB = AC
=> therefore, Angle B = Angle C
=> let angle b and angle c = x
=> now,
=> A + B + C =180
=> x + x + 90 = 180
=> 2x = 90
=> x = 45
there B = 45
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