Dab tsi yog Apothem hauv Geometry?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Cov apothem (qee zaum abbreviated li apo) ntawm ib tug tsis tu ncua polygon yog ib txoj kab ntawm qhov chaw mus rau nruab nrab ntawm ib qho ntawm nws sab. Sib npaug, nws yog kab kos los ntawm qhov nruab nrab ntawm lub polygon uas yog perpendicular mus rau ib qho ntawm nws sab. Lo lus " apothem " kuj tuaj yeem xa mus rau qhov ntev ntawm cov kab ntawd.

Hais txog qhov no, Apothem txhais li cas hauv geometry?

Apothem . ntau Qhov kev ncua deb ntawm qhov nruab nrab ntawm ib qho polygon tsis tu ncua mus rau nruab nrab ntawm ib sab. (Rau ib ncig nws yog qhov kev ncua deb ntawm qhov chaw mus rau qhov nruab nrab ntawm ib chord.) Regular Polygons - Properties.

Kuj Paub, Dab tsi yog Apothem ntawm lub pentagon tsis tu ncua? Cov apothem yog kab los ntawm qhov nruab nrab ntawm lub pentagon mus rau ib sab, sib tshuam sab ntawm lub kaum sab xis ntawm 90º. Tsis txhob confuse cov apothem nrog lub vojvoog, uas kov lub ces kaum (vertex) es tsis txhob ntawm qhov nruab nrab.

Yog li ntawd, yuav ua li cas koj thiaj nrhiav tau lub Apothem ntawm ib tug tsis tu ncua polygon?

Peb kuj tuaj yeem siv thaj chaw qauv rau nrhiav lub apothem yog tias peb paub ob qho tib si cheeb tsam thiab ib puag ncig ntawm a polygon . Qhov no yog vim peb tuaj yeem daws rau ib qho hauv qauv , A = (1/2)aP, los ntawm kev muab ob sab los ntawm 2 thiab faib los ntawm P kom tau 2A / P = a. Ntawm no, cov apothem muaj qhov ntev ntawm 4.817 units.

Yuav ua li cas rau koj nrhiav thaj tsam ntawm daim duab peb sab?

Rau nrhiav tus cheeb tsam ntawm a daim duab peb sab , muab lub hauv paus los ntawm qhov siab, thiab muab faib los ntawm 2. Kev faib los ntawm 2 los ntawm qhov tseeb tias ib qho parallelogram tuaj yeem muab faib ua 2 daim duab peb sab . Piv txwv li, nyob rau hauv daim duab mus rau sab laug, lub cheeb tsam ntawm txhua tus daim duab peb sab yog sib npaug rau ib nrab ntawm cheeb tsam ntawm parallelogram.