Odpowiedź :
a) x^2 + 3^2 = 5^2
x^2 + 9 = 25
x^2 = 25 - 9
x^2 = 16
x = 4
Obw = 5+5+4+4
Obw = 18 cm
P = a*h/2
P = 8*3/2
P = 12 cm2
b) Obw = 13*2+15*2
Obw = 56 cm
P = a*h
P = 15*12
P = 180 cm2
Odpowiedź:
1)
[tex] {3}^{2} + {x}^{2} = {5}^{2} \\ 9 + {x}^{2} = 25 \\ {x}^{2} = 16 \\ x = 4 \\ [/tex]
Ob = 5 + 5 + 4 + 4 = 18
P = 1/2 x 8 x 3 = 12
2)
Ob = 56
P = 15 x 12 = 180