Question

If the vertical angle of an isosceles triangle is 100. Find the measure of its base angel

Answer 1

let the base angle be x,

x+x+100° = 180° (angle sum property of a triangle)
2x = 180-100
x = 80/2
x = 40°

so, the base angles are 40° each.

Mark brainliest if it helps, Thanks.