Cov txheej txheem:

Dab tsi yog 3d duab hauv lej?
Dab tsi yog 3d duab hauv lej?

Video: Dab tsi yog 3d duab hauv lej?

Video: Dab tsi yog 3d duab hauv lej?
Video: Koj Hais Dab Tsi?/Suabci Kwm & Ab Meej Ham/Official MV 2023 2024, Kaum ib hlis
Anonim

Hauv lej lus, a 3D duab muaj peb qhov ntev. D hauv ' 3D ' stands rau dimension. Hauv lub ntiaj teb nrog peb qhov ntev, koj tuaj yeem taug kev mus rau pem hauv ntej, rov qab, sab xis, sab laug, thiab txawm nce thiab nqis. Muaj peev xwm taug kev mus rau hauv qhov chaw thiab rov qab sib txawv 3D los ntawm 2D. Lub ntiaj teb koj nyob yog txhua yam 3D.

Ua raws li qhov no hauv kev xav, dab tsi yog 3d duab piv txwv?

Piv txwv ntawm 3D Cov duab Dice - kub. Lub thawv khau - cuboid los yog duab plaub prism. Ice cream cone - khob khob. Lub ntiaj teb - sphere.

Qhov thib ob, qhov txawv ntawm 2d thiab 3d duab yog dab tsi? A 2D puab yog ib daim duab uas tsuas muaj qhov ntev thiab qhov siab raws li nws qhov ntev. Vim 2D duab dag rau ntawm qhov chaw tiaj tus, lawv tseem hu ua cov duab dav hlau lossis dav hlau cov duab . Thaum lawv muaj thaj chaw, 2D duab tsis muaj ntim. Sib nrug los ntawm qhov ntev thiab qhov siab, a 3D duab kuj muaj qhov dav lossis qhov tob raws li nws qhov loj thib peb.

Tsis tas li ntawd, muaj pes tsawg hom 3d duab muaj?

3D Cov duab

  • Lub voos xwmfab. Tus naj npawb ntawm ntug: 12. Tus naj npawb ntawm lub ntsej muag: 6.
  • Cuboid. Tus naj npawb ntawm ntug: 12. Tus naj npawb ntawm lub ntsej muag: 6.
  • Lub tog raj kheej. Number ntawm ntug: 2.
  • Daim duab peb sab Prism. Number ntawm ntug: 9.
  • Octagonal Prism. Number of Ntug: 24.
  • Tetrahedron. Number ntawm ntug: 6.
  • Square raws Pyramid. Number ntawm ntug: 8.
  • Hexagonal raws Pyramid. Number of Ntug: 12.

Koj yuav txheeb xyuas cov duab 3d li cas?

3D duab muaj lub ntsej muag (sab), ntug thiab vertices (kaum)

  1. ntsej muag. Lub ntsej muag yog ib qho chaw tiaj tus lossis nkhaus ntawm 3D duab. Piv txwv li ib lub voos xwmfab muaj rau lub ntsej muag, lub tog raj kheej muaj peb thiab ib tug kheej kheej muaj ib qho xwb.
  2. Ntug. Ib ntug yog qhov twg ob lub ntsej muag sib ntsib.
  3. Vertices. Lub vertex yog lub ces kaum uas cov npoo sib ntsib.

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