2-dimensional (2D) cov duab tsuas muaj ob qhov ntev, ntev thiab dav. Lawv tuaj yeem kos rau ntawm ib daim ntawv. A polygon yog 2-D duab nrog ncaj sab uas sib ntsib tsis muaj qhov khoob.
2-dimensional shape yog dab tsi?
2D cov duab yog cov duab nrog ob qhov ntev, xws li qhov dav thiab qhov siab. Ib qho piv txwv ntawm 2D duab yog lub duab plaub los yog ib lub voj voog. 2D duab yog tiaj tus thiab tsis tuaj yeem tuav lub cev, vim tias lawv tsis muaj qhov tob; 2D duab yog tiaj tiaj.
Cov piv txwv ntawm 2D duab yog dab tsi?
Rectangle, voj voog, square, daim duab peb sab, quadrilateral thiab pentagon yog qee qhov piv txwv ntawm 2D duab.
Dab tsi yog cov duab ob sab muab piv txwv?
Ib daim duab ob sab yog cov duab uas muaj qhov ntev thiab dav tab sis tsis muaj qhov tob. Hauv kev ua lej, cov duab (cov qauv lej) yog muab los ntawm cov khoom hauv lub ntiaj teb tiag tiag uas muaj cov yam ntxwv geometric. Ib lub voj voog yog ib qho piv txwv ntawm ob sab. Ib daim duab plaub yog lwm qhov piv txwv ntawm ob sab.
2-seem hu ua dab tsi?
ntxiv … Tsuas muaj ob qhov ntev, xws li qhov dav thiab qhov siab tab sis tsis muaj tuab. Squares, Vajvoog, Daim duab peb sab, thiab lwm yam yog ob-dimensional khoom. Kuj tseem hu ua " 2D ".
