Question

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Answer 1

Answer:

Given:-

AB=BC

angle B=40°

if AB=BC

then angle A=angle C(if two opposite sides of a triangle are equal then their opposite angles are also equal)

that is it's an isosceles Triangle

taking angle A and angle C as x each,as they are equal,that is x+x

also

angle A+angle B+angle C=180°(sum of all interior angles of a triangle are supplementary (

x+40+x=180

2x+40=180

2x=180-40

2x=140

x=140/2

x=70°

therefore

angle A=70°

angle C=70°

angle B=40°

hope it helps

Answer 2

Step-by-step explanation:

40

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