Olu nke cone

The mmiri nke cone

Iji mara ego nke cone, ọ dị mkpa ịmata ihe ọ bụ. geometric ahu ike na n'elu bụ isi generators nke geometrical ọgụgụ.

Lines ejikọta n'elu cone na ókè nke isi, na-akpọ generators.

The generator (tapered) ma ọ bụ mpụta elu nke cone na-anọchi anya otu nke niile generators. Ogologo ọnụ ọgụgụ a ogologo akara na-ejikọ na elu na ala nke cone na a nri n'akuku isi. A akara nke ejikọ n'elu na center nke isi, na-akpọ axis. Ị ga-amarakwa na n'akuku n'etiti abụọ megidere mmiri a na-akpọ na n'akuku nke ngwọta.

ụdị

N'ihi na ndị dị otú ahụ shapes dị ka ugwu ahụ, olu nke Mathematics gbakọọ iji dị iche iche formulas na ike ịdị iche iche dabere na ya ụdị. Mgbe ọ na-abịa a cone, ọtụtụ iche a gburugburu ke ukot na nnukwu onu ire. Ma nke a bụ a kwesịghị nke ndị echezọwo usoro ọmụmụ N'ezie. View cone mgbe ya isi Nleta a gburugburu, na-akpọ okirikiri. Ọ bụrụ na Otú ọ dị, nke dị n'ala ala ugwu ahụ bụ a polygon, mgbe ahụ, ọ ga-abụ a pyramid. Ọ bụrụ na ndị isi bụ ihe ellipse, hyperbola ma ọ bụ parabola, dị a na ọnụ ọgụgụ a na-akpọ karị elliptical, parabolic na hyperbolic cone. The abụọ ikpeazụ ikpe na-enweghi ngwụcha olu nke cone.

Iche nke geometric udi nwere ike kere n'ime ndị na-esonụ ụdị: na ihe ọjọọ cone. Nke abụọ ahụ na-eburu na vertex na geometric center nke isi na-ejikọrọ na a akara perpendicular a isi, nke bụ a gburugburu ma ọ bụ a mgbe nile (equilateral) polygon. Ka ihe atụ, perpendicular edoghi ejikọta etiti nke a gburugburu ma ọ bụ ebe a na-nrutu nke diagonals nke square site n'elu. Ọ bụrụ na n'elu na-dechapụ na ikwu na symmetric center nke isi nke a geometric ọgụgụ, ọ na-họpụtara dị ka a scythe.

Ọzọkwa, e nwere a truncated cone (frustum) na, dabere na definition nke jiometrị ọmụmụ ụlọ akwụkwọ, ọ bụghị a kpọmkwem geometric ọnụ ọgụgụ, ma bụ nanị akụkụ nke dum cone (pyramid). Na ndị ọzọ okwu, a ụgbọelu nke na-bụ ihe yiri ka isi ụgbọelu he si cone a nta cone na ndị fọdụrụnụ bụ a truncated cone. Otú ọ dị, ọzọ definition nke usoro ọmụmụ dị nnọọ iche-akọwara echiche nke a truncated cone dị ka a pụrụ iche geometric udi (na ihe banyere ndị dị okirikiri): ahụ obrazovanneo adiana gburugburu a akụkụ anọ trapezoid n'akụkụ, nke Nleta a trapezoid na bases angles.

Olu nke cone na truncated cone

Greek ndị ọkà mmụta sayensị ogologo oge gara aga ewepụtara formulas na aka n'ụzọ ziri ezi gbakọọ olu nke cone na truncated akụkụ.

Iji gbakọọ olu nke a cone, anyị kwesịrị mụbaa ebe nke isi na elu ugwu ahụ, na mgbe ahụ na dapụtara ngwaahịa kewara ekewa site atọ. Quotient, nke anyị ga-ahụ, ha ga-abụ ihe nke ebe cone. Kpọmkwem otu usoro eji maka ịgbakọ olu nke a pyramid, dị ka a pụrụ iche ikpe nke cone. On akwụkwọ, na usoro bụ dị ka ndị: D = UCR / 3, ebe C - a isi ebe, B - elu.

N'ihi na geometric "truncated cone" udi olu gbakọọ a mgbagwoju anya usoro, nke Otú ọ dị, nwekwara adịghị ihe transcendent na mgbagwoju. Nchikota nke radii nke bases, nhata, chịkọtara na ngwaahịa nke isi okirikiri. Ihe ọnụ ọgụgụ na-uba site a mgbe nile nọmba π (3,14) mgbe ọtụtụ site elu. The N'ihi nke a divisible site 3. The usoro maka ịgbakọ olu ga-egosi na akwụkwọ dị ka ndị a: D = VHπH (R1HR1 + R1HR2 R2HR2 +) / 3. Na usoro, Na - elu nke truncated cone, P1 - okirikiri nke ala isi, P2 - okirikiri nke elu isi, π - mgbe nile nọmba (3,14).