Answer:
hgjhghgjgjh
Explanation:
42, 84, 126, 168
Sum of internal angles= 4*180 = 720
x+2x+3x+4x+140+160= 720
10x= 720 - 300
10x= 420
x=42, 2x= 84, 3x= 126, 4x= 168
6.3m questions
8.4m answers