Odpowiedzi

2009-11-11T16:57:02+01:00
P =πr²(alfa) / 360⁰
P = π12²*15⁰/360⁰
P = π144 *15⁰/360⁰
(skrócić)
P = 6π

P = πr²
P = π2²
P = π4
p = 4π

6π/4π = 1,5
7 3 7