Question

In triangle abc BC is equal to ab and angle b is equal to 80 degree then angle a is equal to—————.
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Answer 1

Step-by-step explanation:

20

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Answer 2

Answer:

angle a is equal to 50°

Step-by-step explanation:

if BC =AB

And B=80°

then the triangle ABC is a isosceles Triangle

and thus angle A=Angle C

So

let the angle be x

80°+x+x=180°

80°+2x=180

2x=180-80

2x=100

x=100/2

x=50°

So Angle a is equal to 50°