Equation of sum of interior angles x, y, z together of a triangle is ______
A. x + y + z = 90°
B. x + y + z = 180°
C. x + y + z = 120°
D. x + y = z
Answer:B
Equation of sum of interior angles x, y, z together of a triangle is ______
A. x + y + z = 90° B. x + y + z = 180° C. x + y + z = 120° D. x + y = z