A : pătrat
B : dreptunghi
▪︎ P = 2 × ( L + l ) = 2 × ( 146 + 54 ) = 2×200 = 400 m
▪︎ P = 624 m
latura = 624 : 4 = 156 m
▪︎ A = l^2 = 156 ^2 = 156 × 156 = 24.336 m^2 ( pătrat)
A = L × l = 146 × 54 = 7.884 m^2 ( dreptunghi)
24.336 - 7.884 = 16.452 m ( cu atât )
