Ib lub duab plaub yog ib tus duab uas muaj ob sab ncaj thiab sab xis. Nws tuaj yeem zoo li ob daim duab plaub uas tau muab tso ua ke. Cov duab no zoo li nyuaj dua li lub duab plaub, tab sis txoj kev ua haujlwm ntawm ib puag ncig yog tib yam.
Puas yog square ib lub duab plaub?
Thaj Chaw ntawm Cov Duab Rectilinear
Tsis txhob muab tso rau ntawm lo lus 'rectilinear' - nws tsuas yog txhais tau hais tias cov kaum sab xis yog 90 ° (txoj cai kaum) yog li kev suav ncaj qha. Ntu no suav nrog squares, duab plaub thiab cov duab sib xyaw ua los ntawm ntau tshaj ib qho muab tso ua ke.
Dab tsi yog cov duab rectilinear hauv kos duab?
Rectilinear - Ib daim duab uas muaj cov kab ncaj thiab cov kaum sab xis. Cov duab rectilinear tuaj yeem raug xa mus rau cov duab geometric, txawm hais tias cov duab geometric feem ntau siv "geometry" xws li duab plaub, daim duab peb sab, hexagons, thiab lwm yam.
Yuav ua li cas yog daim duab rectilinear?
Nyob rau hauv lej, ib daim duab rectilinear yog ua los ntawm cov kab ncaj. Ib lub square thiab ib lub duab plaub yog ob qho tib si rectilinear. Rectilinear yog siv los txhais tau tias "ncaj," yog li yog tias ib yam dab tsi txav mus rau hauv txoj kab ncaj nraim, nws muaj cov lus tsa suab rectilinear.
Puas yog daim duab peb sab ib lub duab plaub?
12.5 Daim duab peb sab thiab quadrilaterals
Ib lub dav hlau kaw cov duab kos nrog peb txoj kab ncaj yog txhais tias yog "daim duab peb sab". Daim duab peb sab muaj peb sab thiab peb lub kaumIb lub dav hlau kaw rectilinear kos nrog plaub txoj kab ncaj yog txhais tau tias yog "quadrilateral''.
