Answer:
negative
Step-by-step explanation: it has negative signs
I'm pretty sure the answer is 4 because, 4*21= 84.
I do not know how to show the working out but its 4+6+6
Answer:
if thisa is a triangle then 180-30+30 = 120 degree and we say all angles on a triangle add up to 180
Then reaply the rule changing 180 to 360 on all 4 sided shapes
180(n-2) to all other shapes.
ie) pentagon 180(n-2) = 540
continue with 540-30-30 = 480 etc....
Step-by-step explanation: