Answer:
80
Step-by-step explanation:
delta math
4
split it horizontally, vertically and diagonally twice.
doamin = set builder nation
SA=ph+2A, that is, perimeter × height+ twice area
p=21+20+29=70cm
h=22cm
70×22=1540cm
A=1/2 ×20×21=210×2=420
1540+420=1960cm2