Odpowiedź :
Odpowiedź:
a) d= 9√2
P = 1/2 x d²
P = 1/2 x (9√ 2) ²
P = 1/2 x 162
P = 81cm²
a² = 81
a = 9
Ob = 4 x 9 = 36cm
b) P = 1/2 x (√2/2)
P = 1/2 x 1/2
P = 1/4cm²
a² = 1/4
a = 1/2 cm
Ob = 4 x 1/2 = 2cm
c) P = 1/2 x 1/4
P = 1/8
a²= 1/8
a = 1/(2√2) x √2/√2 = √2/4cm
Ob = 4 x √2/4 = √2cm²
d) P = 1/2 x 3x²
P = 4,5x²
a² = 4,5x²
a = 2,12 xcm
Ob = 4x2,12x = 8,48xcm²