Which relationship is always true for the angles r, x, y, and z of triangle ABC?
Select one:
a. x + z = y
b. 180 degrees − x = r
c. x + y + z = 180 degrees
d. x + y + z = 90 degrees

Which relationship is always true for the angles r x y and z of triangle ABC Select one a x z y b 180 degrees x r c x y z 180 degrees d x y z 90 degrees class=