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

can you "rule out" any of the choices ?

Answer 2

wdym

Answer 3

are any of the choices not the answer ?

Answer 4

the other way to find the answer is to notice
that a straight line is 180 degrees
in other words, x+r add up (form) a straight line

Answer 5

b? @phi

Answer 6

yes