Question

angle abc is an isosceles triangle with ab BC is equals to AC if angle b is equal to 40 degree find angle A and angle C​

Answer 1

Answer:

Angle A = 40° and Angle C = 100°

Answer 2

Given that angle B = 40 degrees

angle A = angle B = 40 degrees ( base angles of isosceles triangle )

angle A + angle B + angle C = 180 degrees ( angles sum property of a triangle )

40 degrees + 40 degrees + angle C = 180 degrees

angle C = 180 degrees - ( 40 degrees + 40 degrees )

angle C = 180 degrees - 80 degrees

angle C = 100 degrees