Gimana ni 8-10 tolong ya plesee

no 8) L1=64×24=1536÷2=768
L2=36×36=1296
LS=2064
no 9)L1=64×82÷2=32×82=2624
L2=26×26=676
LS=3300
no 10)L1=49×34=1666
L2=65×18=1170
LS=2836
maaf kalau salah