Video: Muaj pes tsawg hom daim duab peb sab muaj raws li cov ces kaum?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
peb
Ntawm no, dab tsi yog hom ntawm daim duab peb sab thiab lawv cov khoom?
- Qhov sum ntawm cov ces kaum hauv ib daim duab peb sab yog 180 °.
- Ib daim duab peb sab sib npaug muaj peb sab sib npaug thiab kaum.
- Daim duab peb sab isosceles tuaj yeem kos rau ntau txoj hauv kev.
- Daim duab peb sab txoj cai muaj ib lub kaum 90 °.
- Ib daim duab peb sab scalene muaj peb lub kaum sib txawv thiab tsis muaj ib sab ntawm qhov sib npaug ntawm qhov ntev.
Ib yam li ntawd, cov npe ntawm daim duab peb sab yog dab tsi? Sib npaug, Isosceles thiab Scalene. Muaj peb lub npe tshwj xeeb muab rau cov duab peb sab uas qhia tias muaj pes tsawg sab (lossis cov ces kaum) sib npaug.
Ntawm no, dab tsi yog 6 hom daim duab peb sab?
Muaj ntau tus ntau hom duab peb sab , xws li equilateral daim duab peb sab , yog daim duab peb sab , scalene daim duab peb sab , obtuse daim duab peb sab , mob daim duab peb sab , thiab isosceles daim duab peb sab.
Dab tsi yog 7 hom duab peb sab?
Kawm txog thiab tsim xya hom ntawm daim duab peb sab uas muaj nyob rau hauv lub ntiaj teb no: equilateral, txoj cai isosceles, obtuse isosceles, mob isosceles, txoj cai scalene, obtuse scalene, thiab mob scalene.
Pom zoo:
Cov kab lus hloov sab hauv cov ces kaum piav qhia txoj haujlwm ntawm ob lub kaum sab xis li cas?
Hloov sab hauv cov ces kaum yog tsim los ntawm ib tug transversal intersecting ob parallel kab. Lawv nyob nruab nrab ntawm ob qho tib si kab tab sis nyob rau sab nraud ntawm lub transversal, tsim ob khub (plaub tag nrho cov ces kaum) ntawm cov ces kaum sab hauv. Hloov cov ces kaum sab hauv yog congruent, txhais tau tias lawv muaj qhov sib npaug
Koj tuaj yeem ua pov thawj li cas 2 daim duab peb sab zoo sib xws siv lub kaum sab xis sab SAS zoo sib xws postulate?
SAS Similarity Theorem hais tias yog ob sab hauv ib daim duab peb sab yog proportional rau ob sab hauv lwm daim duab peb sab thiab lub kaum sab xis nyob rau hauv ob qho tib si congruent, ces ob daim duab peb sab zoo ib yam. Ib qho kev hloov pauv zoo sib xws yog ib lossis ntau qhov kev hloov pauv tsis tu ncua ua raws li kev dilation
Koj ua pov thawj li cas ntawm cov ces kaum sab nrauv ntawm daim duab peb sab yog 360?
Lub kaum sab nrauv ntawm daim duab peb sab yog sib npaug rau qhov sib npaug ntawm cov kaum sab hauv sab nraud. Yog xav paub ntxiv txog qhov no saib Daim duab peb sab sab nraud lub kaum sab xis theorem. Yog tias lub kaum sib npaug raug coj los ntawm txhua qhov vertex, cov ces kaum sab nrauv ib txwm ntxiv rau 360 ° Qhov tseeb, qhov no muaj tseeb rau txhua qhov convex polygon, tsis yog daim duab peb sab
Vim li cas nws thiaj li hais tias lub Orthocenter ntawm daim duab peb sab obtuse yuav tsum nyob rau sab nraud ntawm daim duab peb sab?
Nws hloov tawm tias tag nrho peb qhov siab ib txwm sib tshuam ntawm tib lub ntsiab lus - lub npe hu ua orthocenter ntawm daim duab peb sab. Lub orthocenter tsis yog ib txwm nyob hauv daim duab peb sab. Yog tias daim duab peb sab yog obtuse, nws yuav nyob sab nraud. Txhawm rau ua kom qhov no tshwm sim cov kab qhov siab yuav tsum tau txuas ntxiv kom lawv hla
Dab tsi yog kev sib raug zoo ntawm sab nrauv thiab sab hauv lub kaum sab xis ntawm daim duab peb sab?
Cov kaum sab hauv yog hu ua Sab hauv cov ces kaum. Cov lej ntawm cov kaum sab hauv ntawm daim duab peb sab yog ib txwm 180 degrees. Lub kaum sab nrauv yog lub kaum sab xis ntawm ib sab ntawm ib qho duab, thiab ib txoj kab txuas ntxiv los ntawm sab tom ntej. Qhov sib npaug ntawm lub kaum sab nrauv thiab nws lub kaum sab hauv uas nyob ib sab kuj yog 180 degrees