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

A triangle is shown with a leg extending past the top vertex. The vertices are labeled ABC. Angle y is located inside the triangle at vertex B. Angle z is located inside the triangle at vertex C. Angle x is located outside the triangle between beside vertex A and the extended leg. Angle r is located inside the triangle at vertex A.
x + z = y
180 degrees − x = r
x + y + z = 180 degrees
x + y + z = 90 degrees

Question

Which relationship is always true for the angles r, x, y, and z of triangle ABC?

A triangle is shown with a leg extending past the top vertex. The vertices are labeled ABC. Angle y is located inside the triangle at vertex B. Angle z is located inside the triangle at vertex C. Angle x is located outside the triangle between beside vertex A and the extended leg. Angle r is located inside the triangle at vertex A.
x + z = y
180 degrees − x = r
x + y + z = 180 degrees
x + y + z = 90 degrees

anonymous · Answer

@baconbaby1334 @blackops2luvr @BlossomCake @Awolflover1

anonymous · Answer

sorry I am real bad at angles sorry I couldn't help