Odpowiedź :
Korzystamy z twierdzenia pitagorasa
12^2 + 9^2 = x^2
144 + 81 = x^2
x= 15
12^2 + 16^2 = y^2
144 + 256 = y^2
y= 20
Ob= 9 + 16 + 15 + 20 = 50cm
12^2 + 9^2 = x^2
144 + 81 = x^2
x= 15
12^2 + 16^2 = y^2
144 + 256 = y^2
y= 20
Ob= 9 + 16 + 15 + 20 = 50cm