Question

△ABC is isosceles AB=AC. If ∠A=70°, what is the measure of ∠B? 55° 66° 77° none of these

Answer 1

since this is an iscoceles triangle so two sides are equal that is AB=AC.

Now according to the theorem

angles opposite to equal sides are equal.

So, angle A is equal to Angle B i.e. A=B= 70°

Now, sum of all angles of triangle is equal to 180°.

therefore, 70+70+x=180

140+X= 180

X= 40

but there is no option therefore the answer is

' non 0f these '