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2015-11-01T14:08:00+05:30

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AB=AC, it means angles opposite to equal sides are equal.therefere
angle B is also equal to angle C.
let the missing angles be x
⇒x°+x°+40°= 180°
⇒2x°+40°=180°
⇒2x°=180-40
⇒2x°=140°
⇒x°=140°/2
=70°
angle ABC = 70°
i think this will help u.

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please mark my answer as brainliest
2015-11-01T15:46:30+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Sum of three angles  A +  B + C = 180°
so  sum of angles  ABC + ACB = 180 ° - 40° = 140°
Since two sides are equal, it  is an isosceles triangle.

so angle ACB = angle ABC = 140 /2 = 70°
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