Odpowiedzi

2009-11-05T22:58:58+01:00
X+1,4x+1,4x = 57
3,8x = 57
x = 15

15, 21, 21 - dlugosci bokow

h^2 = 21^2 - 7,5^2
h^2 = 441 - 56,25
h^2 = 384,75
h = 15*sqrt(15,39)

P = ah/2
P = 15 * 15* sqrt(15,39)
P = 225sqrt(15,39)
2009-11-05T23:05:35+01:00
X+1,4x+1,4x = 57
3,8x = 57
x = 15

15, 21, 21 - długość bok.

h^2 = 21^2 - 7,5^2
h^2 = 441 - 56,25
h^2 = 384,75
h = 15*sqrt(15,39)

P = ah/2
P = 15 * 15* sqrt(15,39)
P = 225sqrt(15,39)