N'akwụkwọ a, anyị ga-atụle otu esi achọta radius nke sphere nke gbara gburugburu cone, yana mpaghara elu ya na olu nke bọlbụ nke a na-agbanye n'akụkụ a.
Ịchọta radius nke sphere/ball
Enwere ike ịkọwa nke ọ bụla. N'ikwu ya n'ụzọ ọzọ, enwere ike ịde cone n'akụkụ ọ bụla.
Iji chọta radius nke sphere (bọọlụ) gbara gburugburu banyere cone, anyị na-ese akụkụ axial nke cone. N'ihi ya, anyị na-enweta triangle isosceles (n'ọnọdụ anyị - ABC), gburugburu nke okirikiri nwere okirikiri r.
radius isi cone (R) hà na ọkara isi nke triangle (BC), na generators (l) - akụkụ ya (AB и BC).
Radius nke gburugburu (r)gbara gburugburu triangle ABC, n'etiti ihe ndị ọzọ, bụ radius nke bọọlụ gbara gburugburu cone. A na-achọta ya dịka usoro ndị a si dị:
1. Site na generatrix na radius nke isi nke cone:
2. Site na elu na radius nke isi nke cone
elu (h) cone bụ akụkụ BE na foto dị n'elu.
Ụdị maka mpaghara na olu nke sphere/ball
Ịmara radius (r) ị nwere ike ịhụ ebe elu (S) Mpaghara na olu (V) Oghere nke gbara okirikiri a:
Cheta na: π gbara okirikiri nhata 3,14.