Question

What is the value of y?

Enter your answer in the box.

y = _____

Answer 1

Answer: 20

Explanation:

triangle sum theorem

Answer 2

y =20

Explanation:

since this is an isosceles triangle <b= <c

<b =25 so < c =25

triangles add to 180

<a + <b + <c =180

<a + 25+25 = 180

<a + 50 = 180

subtract 50 from each side

<a = 130

3y+70 = 130

subtract 70 from each side

3y = 60

divide by 3

y =20