Question

In triangle ABC, if AB=BC and ∠B = 80°, ∠A will be​

Answer 1

Answer:

Step-by-step explanation:

given,

angle b=80

let angle a =x=angle c                                          (ab=bc)

sum of angles in a triangle is 180

x+x+80=180

2x=100

x=50

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Answer 2

Answer:

√A=20°

Step-by-step explanation:

In ∆ABC,

√ABC=80°(GIVEN)

√ABC=√BCA (Angles opposite to equal sides are equal)

√ABC+√BCA+√CAB=180°(ASP)

80°+80°+√CAB=180°

√CAB=180°-160°

√CAB=20° OR √A=20°