Question

in isosceles traingle ABC,AB=AC.if B=55 calculate A​

Answer 1

$isosceles \: triangle \: mean \\ two \: side \: equal... \\ ab = ac(given) \\ b = c = 55degree \\ some \: of \: three \: angles \: = 180 \\ degree \\ \\ a = 180 - 55 + 55 \\ 180 - 110 = 170 \\ therefore \: angle \: a= 170degree$

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