Question

in an isosceles triangle . the base angle are equal. the vertex angle is 40 degrees.
what are the base angle of the triangle. ​

Answer 1

Let the base angles be x

Then,x+x+40°=180°

2x+40°=180°

2x=180°-140°

x=70°

The base angles of the triangle are 70° and 70°

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Answer 2

Answer:

70°

Step-by-step explanation:

let angles be A , B , C

A be vertex and B and C be base

B = C

A = 40°

A+B+C = 180°

40+2B = 180° (B = C)

2B = 180-40

B = 140/2

B = 70°

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