Tolong bantu kakkkk.....

21. L1 = 1/2 x phi x r(kuadrat)
= 1/2 x 22/7 x 7
= 1/2 x 22
L1 = 11

L2 = s x s
= 14 x 14
L2 = 196

L3 = 1/2 x phi x r(kuadrat)
= 1/2 x 22/7 x 7
= 1/2 x 22
L3 = 11

L seluruhnya = L1 + L2 + L3
= 11 + 196 + 11
= 218dm2