Answer:
x = 13
Step-by-step explanation:
3x + 60 + 3x + 42 = 180 {Linear pair}
3x + 3x + 60 + 42 = 180 {Combine like terms}
6x + 102 = 180 {Subtract 102 from both sides}
6x = 180 - 102
6x = 78 {Divide both sides by 6}
x = 78/6
The answer is c
Yeahhhhh
x = 21
Inscribed angle = (3x - 3)°
Intercepted arc measure = 120°
Thus:
(3x - 3)° = ½(120°) => an inscribed angle of any circle = ½ the measure of its intercepted arc.
Multiply both sides by 2
2(3x - 3) = 120
6x - 6 = 120
6x - 6 + 6 = 120 + 6
6x = 126
6x/6 = 126/6