first equation is line B the second one C the third one is A
Answer:
More than one triangle because it has to measure up to 180°
81 + 52 + 47 = 180
Step-by-step explanation:
An exterior angle of a triangle is equal to the sum of the opposite interior
angles
9x = 5x + 9 + x
9x = 6x + 9
9x - 6x = 9
3x = 9
x = 9/3
x = 3