Question

The measure of the vertex angle of an isosceles triangle is 120. What is the measure of the base angle?

Answer 1

(180-120)/2

Answer 2

What?

Answer 3

the total interior angels of a triangle are 180, if one angle is 120 and the triangle is isoceles then the ther two angles are equal so 180-120 then divide by 2

Answer 4

Sweet :) so the answer is 30

Answer 5

yep

Answer 6

30



Base angles of an isosceles triangle are congruent. The vertex angle of the triangle =120 which leaves 60 for the sum of the other two angles. They are equal in measure and each has measure 30.