Question

What is the value of y

Answer 1

All the angles in a triangle equal 180 degrees.

So,

y+40+y+30= 180

2y+70= 180

2y= 110

Divide by 2.

y= 55

"A" is the answer.

I hope this helps!
~kaikers

Answer 2

Well we know where the y + 30 degrees is not a right angle it is a little bit from a right angle. So we know if we add 110 to 30 that will equal more than 90 degrees. So c is not the answer. If we add 85 to 30 that also equals more than 90 degrees. 10 plus 30 equals 40degrees. But that does not look like it is 40 degrees because the other angle is 40 degrees. So A is the answer 55 degrees.