Question

An equilateral triangle and an isosceles triangle share a common side. What is the measure of /_ABC?

Answer 1

The sum of all the angles in a triangle is equal to 180 degrees

For an equilateral triangle, all sides are equal

i.e 60 + 60 + 60= 180

For an isosceles triangle, two sides are equal

the first image is an isosceles triangle why the second image is an equilateral triangle