Question

Which relationship is always true for the angles r, x, y, and z of triangle ABC?

x + z = y
180 degrees − x = r
x + y + z = 180 degrees
x + y + z = 90 degrees

Answer 1

B

Explanation:

We can see that angles r and x are both on a line cut by a perpendicular line. This means that the angles on the line should add up to 180.

`x+r=180`

We can move x to the other side.

`180-x=r`