Odpowiedzi

2009-11-26T21:52:49+01:00
R = 4 cm
r = 1/2h => h = 8 cm

sinα = 4/5 = h/a
4/5 = 8/a
4a = 40
a = 10 cm

P = a*h = 80
P = 1/2 * e * f
e * f = 160
1/4e^2 + 1/4f^2 = a^2 /*4
e^2 + f^2 = 400

1 1 1