Question

The vertical angle of an isosceles triangle is 100°, find its base angles​

Answer 1

Step-by-step explanation:

Let x be the base angles.

x + x + 100 = 180°. ( base angles are equal and angle sum property of a triangle )

2x + 100 = 180

2x = 180-100

2x = 80

x = 80/2

x = 40°