Question

ABC is an isoscles triangle. Angle A = 40°.

Find measure of Angle B.

40

70

75

180

Answer 1

70 degrees

Explanation:

total angle in a triangle is 180 degrees

180-40= 140

Angle b and c is total of 140 degrees

they are isosceles so their measurements would be same.

angle b and c is 140÷ 2 = 70

so angle b is 70 degrees