Question

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

Answer 1

Step-by-step explanation:

let the remaining each angle be x

according to question,

x+x+40°=180° (sum of three angle of triangle)

2x+40°=180°

2x=180°-40°

2x=140°

x=70°

Answer 2

Answer:

angle a =40°

let base angles, which are equal be x°,

angle b =x°

angle c =x°

Now, angle sum property of triangle is 180°,

a+b+c = 180

40 + x + x = 180

40+2x =180

2x =140

x=140/2

x=70°

Therefore,

a =40°

b =x = 70°

c =x = 70°

Here is your answer.....