Question

Given the triangle below, what is the value of y?
50°
50%
3y-10
y+20

Answer 1

y = 15

Explanation:

the triangle has congruent base angles of 50°

This means the triangle is isosceles with the 2 legs being congruent, so

3y - 10 = y + 20 ( subtract y from both sides )

2y - 10 = 20 ( add 10 to both sides )

2y = 30 ( divide both sides by 2 )

y = 15