Gịnị bụ pyramid mgbe niile: nkọwa, ụdị, Njirimara

N'akwụkwọ a, anyị ga-atụle nkọwa, ụdị (triangular, quadrangular, hexagonal) na ihe ndị bụ isi nke pyramid mgbe niile. Ozi a gosipụtara na-esonyere ya na eserese a na-ahụ anya maka nghọta ka mma.

Nkọwa nke pyramid oge niile

Pyramid oge niile - nke a, isi ya bụ polygon mgbe niile, na elu nke ọnụ ọgụgụ ahụ na-atụba n'etiti etiti ya.

Ụdị pyramid ndị a na-ahụkarị bụ triangular, quadrangular na hexagonal. Ka anyị tụlee ha n'ụzọ zuru ezu karị.

Ụdị pyramid oge niile

Pyramid triangular mgbe niile

• Ntọala – triangle aka nri/ nha nhata ABC
• Ihu dị n'akụkụ bụ otu triangles isosceles: ADC, BDC и ADB.
• Ntugharị akụkụ D na ndabere - isi O, nke bụ ebe nkwụsị nke elu / ndị na-agba ọsọ / bisector nke triangle ABC.
• DO bụ elu nke pyramid.
• DL и DM - apothemes, ntụgharị elu nke ihu akụkụ (isosceles triangles). Enwere atọ na mkpokọta (otu maka ihu ọ bụla), mana foto dị n'elu na-egosi abụọ ka ọ ghara ibufe ya.
• ⦟DAM = ⦟ DBL = a (akuku n'etiti ọgịrịga akụkụ na isi).
• ⦟DLB = ⦟DMA = b (akụkụ dị n'etiti ihu akụkụ na ụgbọ elu ala).
• Maka pyramid dị otú ahụ, njikọ a bụ eziokwu:

  AO:OM = 2:1 or BO:OL = 2:1.

Cheta na: Ọ bụrụ na pyramid triangular mgbe niile nwere akụkụ niile hà nhata, a na-akpọkwa ya ziri ezi .

Pyramid akụkụ anọ mgbe niile

• Ntọala ahụ bụ akụkụ anọ mgbe niile ABCD, N'ikwu ya n'ụzọ ọzọ, square.
• Ihu akụkụ bụ triangles isosceles hà nhata: Ọnọdụ izugbe nke ịzụrụ, BEC, CED и AED.
• Ntugharị akụkụ E na ndabere - isi O, bụ ebe mgbaba nke diagonals nke square ahụ ABCD.
• EO - elu nke ọnụ ọgụgụ.
• EN и EM - apothemes (enwere 4 na mkpokọta, ọ bụ naanị abụọ ka egosiri na ọnụ ọgụgụ ahụ dị ka ihe atụ).
• A na-egosipụta akụkụ nha anya n'etiti akụkụ/ihu na ntọala site na mkpụrụedemede kwekọrọ (a и b).

Pyramid hexagonal mgbe niile

• Ntọala ahụ bụ hexagon mgbe niile ABCDEF.
• Ihu akụkụ bụ triangles isosceles hà nhata: AGB, BGC, CGD, DGE, EGF и FGA.
• Ntugharị akụkụ G na ndabere - isi O, bụ ebe nkwụsị nke diagonals/bisector nke hexagon ABCDEF.
• GO bụ elu nke pyramid.
• GN - apothem (a ga-enwe isii na mkpokọta).

Njirimara nke pyramid oge niile

1. Akụkụ akụkụ niile nke ọnụ ọgụgụ ahụ hà nhata. N'ikwu ya n'ụzọ ọzọ, elu pyramid ahụ dị n'otu ebe dị anya site n'akụkụ niile nke ntọala ya.
2. Akụkụ dị n'etiti ọgịrịga akụkụ niile na isi bụ otu.
3. Ihu niile na-atụgharị na ntọala n'otu akụkụ.
4. Ebe ihu akụkụ niile hà nhata.
5. Apọthems niile hà nhata.
6. Enwere ike ịkọwa pyramid gburugburu, ebe etiti ya ga-abụ ebe nkwụsị nke perpendiculars na-adọta n'etiti etiti nke akụkụ akụkụ.
7. Enwere ike ịdepụta oghere na pyramid, nke etiti ya ga-abụ ebe nkwụsị nke bisectors, na-amalite na nkuku n'etiti akụkụ akụkụ na isi nke ọnụ ọgụgụ ahụ.

Cheta na: A na-ewepụta usoro maka ịchọta, yana pyramid, n'akwụkwọ dị iche iche.