Odpowiedzi

2009-04-16T18:27:09+02:00
C = 20
20 = a√2|:√2
a= 20/√2 = 20√2/2 = 10√2

c² - a² = h²
20² - (10√2)² = h²
h² = 400 + 200
h² = 600 |√
h = 2√150 = 7√6

Pp = 2 x (10√2)² + 4 x (10√2 x 7√6) = 2 x 200 + 4 x 70√12 =
400 + 4 x 72√3 = 400 + 288√3 cm²
7 4 7
2009-04-16T18:29:11+02:00
H=a√2=20/√2=10√2
a=10
P=2a²+4aH=2*100+4*10*10√2=200+400√2=200(1+2√2)