Question

In an isosceles triangle , the base angle are equal. The vertex angle 40° what are the base angle angle of the triangle ?(Remeber ,the sum of three angle of a triangle is 180°)​

Answer 1

Answer:

let the 2 equal base angles be x

so, x+x+40=180 (sum of angle = 180)

2x=180-40

2x=140

x=140/2

x=70

so the measure of 2 equal angles is 70 degree

Answer 2

Solution :-

Given :-

• The base angles are equal.

• The vertex angle is 40 °.

To Find :-

• What are the base angle of the triangle ?

Step-by-step-explaination :-

Let,

• The base angle of the isosceles triangle be x

According to the question,

x + x + 40° = 180°

2x + 40° = 180°

2x = 180° - 40°

2x = 140°

x = 140/2

x = 70

Hence,

The base angle of the isosceles triangle = 70°.