Question

the vertical angle of an isosceles triangle is 100 find it base angle​

Answer 1

Answer:

sum of angle of a triangle : 180

let take the other two angles as x and y

in a isosceles triangle 2 angles are equal

x and y are equal

180 : 100 + x + y

x + y : 180 - 100 = 80

x = y = 80 / 2 =40