Question

the angle of vertex of an isosceles triangle is 100 degree. find its base angle.​

Answer 1

Answer:

40⁰

Step-by-step explanation:

x+x+100=180

2x=80

x=40⁰

hope it help

Answer 2

A = angle of vertex of an isosceles triangle is= 100 (given)

Let base angle = ∠ B= ∠ C

We know ,

∠ A+ ∠ B + ∠C = 180°

∠ B + ∠C = 180°-100°

2 ∠B = 80°

∠ B = 40°

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