Janek191:
a = 15
b = 20
więc c
2 = a
2 + b
2 = 15
2 + 20
2 = 225 + 400 = 625
c =
√625 = 25
P
Δ = 0,5 a*b = 0,5*15*20 = 150
P
Δ = 0,5 c*h = 150 ⇒ 25 h = 300 ⇒ h = 300 : 25 = 12
więc r = h = 12
| | 1 | | 1 | | 1 | |
V = |
| π r2 *( h1 + h2} = |
| π *122 *c = |
| π*144*25 = 1200π |
| | 3 | | 3 | | 3 | |
Odp. V = 1200 π cm
3
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