Answer:
its i dont know
Step-by-step explanation:
A line is 180°, so the supplementary angel makes up the difference between. 180 - 60 = 120°
Answer:
57
Step-by-step explanation:
Angle QRT is an exterior angle to the triangle. The rule is that the exterior angle of a triangle is equal to the sum of its remote interior angles. Those remote interior angles are angle RTS and angle TSR. So our equation is

. We can remove the parenthesis and simplify by combining like terms to get 9x = 5x + 9 + x and 9x = 6x + 9 and 3x = 9. That means that x = 3.