Question

(4) In triangle ABC, if AB=BC and ∠B = 70, ∠A will be:
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Answer 1

Answer:

angle A will be also 70

Step-by-step explanation:

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Answer 2

if angle b is 70 degrees... angle c is also 70 degrees..... angles formed by two equal sides of a triangle is equal.......

now, both angles are 70 degrees which add up to 140 degrees.

the sum of angles of triangle-180 degrees

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so we know angle c and angle b

so angle a+angle b+angle c=180

angle a+70+70=180

angle a+140=180

angle a=180-140

angle a=40 degrees