Answer:
I THINK! 420 cm^2
Explanation:
ok i don't really feel like explaining why rn cuz i'm doing something, but if you want to know way just tell me and i'll explain. Also I took this lesson last week I'm in 7th grade k12 and my teacher today explained it pretty well. So since I am not a pro I don't know if this will be right but tell me if it is thank you:)