Phiramide e tloaelehileng ke eng: tlhaloso, mefuta, thepa

Khatisong ena, re tla nahana ka tlhaloso, mefuta (triangular, quadrangular, hexagonal) le thepa ea mantlha ea piramide e tloaelehileng. Lintlha tse hlahisitsoeng li tsamaea le litšoantšo tse bonoang bakeng sa temoho e ntle.

Tlhaloso ea piramite e tloaelehileng

Phiramide e tloaelehileng - sena, setsi sa eona se nang le polygon e tloaelehileng, 'me karolo e ka holimo ea setšoantšo e hlahisoa bohareng ba setsi sa eona.

Mefuta e tloaelehileng haholo ea liphiramide tse tloaelehileng ke tse tharo, quadrangular le hexagonal. A re ke re li hlahlobe ka botlalo.

Mefuta ea piramide e tloaelehileng

Phiramide e tloaelehileng ea khutlotharo

• Motheo - kgutlotharo e nepahetseng / equilateral ABC.
• Lifahleho tse ka mahlakoreng li tšoana le likhutlotharo tsa isosceles: ADC, BDC и ADB.
• Projection lintlha tsa D motheong - ntlha O, e leng ntlha ea mateano ea bophahamo/bohare/likarolo tse peli tsa khutlotharo ABC.
• DO ke bophahamo ba piramite.
• DL и DM - li-apotheme, ke hore bophahamo ba lifahleho tse mahlakoreng (lisosceles triangles). Ho na le tse tharo ka kakaretso (e le 'ngoe bakeng sa sefahleho ka seng), empa setšoantšo se ka holimo se bontša tse peli e le hore li se ke tsa e jarisa.
• ⦟DAM = ⦟ DBL = a (li-angles pakeng tsa likhopo tse ka mahlakoreng le botlaaseng).
• ⦟DLB = ⦟DMA = b (li-angles pakeng tsa lifahleho tse mahlakoreng le sefofane sa motheo).
• Bakeng sa piramite e joalo, kamano e latelang ke 'nete:

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

Hlokomela: haeba piramite e tloaelehileng ea khutlotharo e na le mahlakore ohle a lekanang, e boetse e bitsoa E nepahetse .

Phiramide e tloaelehileng ea quadrangular

• Motheo ke quadrilateral e tloaelehileng ABCD, ka mantsoe a mang, sekwere.
• Lifahleho tse ka mahlakoreng li lekana le likhutlotharo tsa isosceles: Maemo a Kakaretso a ho Reka, BEC, CED и AED.
• Projection lithapo E motheong - ntlha O, ke ntlha ea mateano ea li-diagonal tsa lisekoere ABCD.
• EO – bophahamo ba setšoantšo.
• EN и EM - li-apotheme (ho na le 4 ka kakaretso, ke tse peli feela tse bontšitsoeng setšoantšong e le mohlala).
• Li-angles tse lekanang pakeng tsa mahlakore / lifahleho le motheo li bontšoa ke litlhaku tse lumellanang (a и b).

Phiramide e tloaelehileng ea hexagonal

• Motheo ke hexagon e tloaelehileng ABCDEF.
• Lifahleho tse ka mahlakoreng li lekana le likhutlotharo tsa isosceles: AGB, BGC, CGD, DGE, EGF и FGA.
• Projection lintlha tsa G motheong - ntlha O, ke ntlha ea mateano ea li-diagonal/likarolo tse peli tsa hexagon ABCDEF.
• GO ke bophahamo ba piramite.
• GN – apothem (ho lokela ho ba tse tsheletseng ka kakaretso).

Thepa ea piramite e tloaelehileng

1. Mahlakore 'ohle a setšoantšo a lekana. Ka mantsoe a mang, tlhōrō ea piramite e sebakeng se le seng ho tloha likhutlong tsohle tsa motheo oa eona.
2. Lehlakore le pakeng tsa likhopo tsohle tsa mahlakoreng le botlaaseng lea tšoana.
3. Lifahleho tsohle li sekametse motheong ka lehlakoreng le le leng.
4. Libaka tsa lifahleho tsohle tsa mahlakoreng lia lekana.
5. Li-aphotheme kaofela lia lekana.
6. Ho potoloha piramite ho ka hlalosoa, bohareng ba eona e tla ba ntlha ea mateano ea li-perpendiculars tse huleloang ho li-midpoints tsa mahlakoreng a mahlakoreng.
7. Sebaka se ka ngoloa ka piramite, bohareng ba eona e tla ba sebaka sa marang-rang sa li-bisectors, tse tsoang likhutlong tse pakeng tsa mahlakore a mahlakoreng le setsi sa setšoantšo.

Hlokomela: Liforomo tsa ho fumana, hammoho le liphiramide, li hlahisoa ka lingoliloeng tse fapaneng.