Question

What is the value of y?​

Answer 1

The value of y is 40

From the diagram given :

• 5x = 40 (base angles of isosceles triangles are equal)

Now we have :

(2y + 20) + 40 + 40 = 180 (sum of angles in a triangle)

2y + 20 + 80 = 180

2y + 100 = 180

2y = 80

y = 40

Hence , the value of y is 40