Question

What is the measure of a base angle of an isosceles triangle if the vertex angle measures 38 degrees and the two congruent sides each measures 21 units ?

Answer 1

All the angles of a triangle add up to 180 correct?

Answer 2

Right

Answer 3

So one of the base angles should be (180-38)/2= ?

Answer 4

Understand what i did?

Answer 5

Ohh.. Yeah the base has to be the same... so 71?

Answer 6

Yep