Answer:
metre it with scale and then write its value with points
Step-by-step explanation:
a + a + a + 120 + 90 = 360
Combine like terms
3a + 210 = 360
Subtract 210 from both sides
3a = 360 - 210
3a = 150
Divide both sides by 3
a = 150/3
a = 50°
