Question

In triangle ABC, if AB=BC and ∠B = 70°, ∠A will be:

Answer 1

Answer:

If AB=BC and <B=70⁰

hence by angle sum property

<A+<B+<C=180⁰

As AB=BC and <B=70⁰ so <C=70⁰(Angles opposite to equal sides of a triangle are equal to one another)

So 140⁰+<A=180⁰

<A=40⁰

Answer 2

Answer:

In ABC

given AB=BC

So (We know that angle opp. to equal sides are always ) Angel A = angel B

let angl

let A= Angel C =X

so Angle(A + B +C) =180

70+ X+X =180

2x=180-70

2X= 110

X=55

angel A =55

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