L = 2·l
aria = L · l ; 1250 = 2 ·l· l ; 1250 = 2·l²
l² =1250 :2 ; l² =625 ; l = √625 = 25m si L = 2·25 =50 m
a . perim =2 ·( L + l ) = 2 ·( 50m + 25m) = 2 ·75m = 150m
b. d² = L² + l² ; d² = ( 50m)² + ( 25m)² = 3125 m²
d= √3125 m = 25√5 m
c,
Oana = d +d = 25√5m + 25√5m = 50√5m
Mihai =perim. = 150m
50√5 = 50·2,23 m = 111 ,80m
⇒ 50√5m ; 150 m