Ib daim duab peb sab sib npaug tuaj yeem tsim los ntawm noj ob qhov chaw ntawm lub voj voog thiab ob qho ntawm cov ntsiab lus ntawm kev sib tshuam. Nyob rau hauv ob txoj kev ib tug by-product yog tsim ntawm vesica piscis. Cov pov thawj tias qhov tshwm sim yog daim duab peb sab sib npaug yog thawj qhov kev pom zoo hauv Phau Ntawv I ntawm Euclid's Elements.
Dab tsi yog daim duab peb sab sib npaug piav qhia?
Ib daim duab peb sab sib npaug yog daim duab peb sab nrog tag nrho peb sab ntawm qhov sib npaug, sib xws rau qhov uas tuaj yeem raug hu ua "ib txwm" daim duab peb sab. Ib daim duab peb sab sib npaug yog qhov tshwj xeeb ntawm daim duab peb sab isosceles tsis yog ob, tab sis tag nrho peb sab sib npaug.
Dab tsi yog daim duab peb sab sib npaug thiab nws cov qauv?
Area of Equilateral Triangle Formula: K=(1/4)√3a. Qhov siab ntawm Equilateral Daim duab peb sab: h=(1/2)√3a. Lub kaum sab xis ntawm daim duab peb sab sib npaug: A=B=C=60 degrees. Sab ntawm Equilateral Daim duab peb sab: a sib npaug b sib npaug c.
Vim li cas thaj tsam ntawm daim duab peb sab sib npaug?
Feem ntau, qhov siab ntawm daim duab peb sab sib npaug yog sib npaug rau √3 / 2 npaug ntawm ib sab ntawm daim duab peb sab sib npaug. Qhov cheeb tsam ntawm daim duab peb sab equilateral yog sib npaug rau 1/2√3s / 2s=√3s 2 /4.
Dab tsi yog daim duab peb sab zoo meej?
Hauv trigonometry, daim duab peb sab zoo meej txhais tau tias yog daim duab peb sab uas muaj ib puag ncig sib npaug rau nws thaj chaw. Muaj ntau txoj hauv kev los nrhiav cov duab peb sab zoo meej. Ib daim duab peb sab zoo meej tuaj yeem yog ib qhoequilateral, ib qho isosceles, los yog daim duab peb sab. Kab lus no yuav qhia koj ntau yam piv txwv!
