Question

in aΔABC, if AB=AC and angle B=65°find angle A

Answer 1

heya.........

if AB = AC
angle B = angle C ( angles opposite to equal sides are also equal )
angle A + angle B + angle C = 180
65+65+a = 180
a + 130 = 180
a = 50

hope it helps

Answer 2

Heya....!!!

HERE IS YOUR ANSWER
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In ΔABC,
AB = AC ...........(given)
Angle B = 65° ................(given)
Angle B = Angle C
(angles opposite to equal sides are equal)
Angle C = 65°

Angle A + Angle B + Angle C = 180°
(as the sum of all angles of triangle = 180°)

Angle A + 65° + 65° = 180°
Angle A + 130° = 180°
Angle A = 180°-130°
Angle A = 50°

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HOPE IT HELPS!!!!!