Question

Find the value of y.
y = 5
y = 10
y = 47.5
y = 60

Answer 1

y = 5

Explanation:

All the sides are equal, so all the angles are equal

The angles of a triangle add to 180

180/3 = 60

Each angle is 60 degrees

8y+20 = 60

Subtract 20 from each side

8y+20-20 = 60-20

8y= 40

Divide by 8

8y/8 = 40/8

y = 5