Cov txheej txheem:

Cov qauv twg rau daim duab peb sab congruence tuaj yeem siv tau?
Cov qauv twg rau daim duab peb sab congruence tuaj yeem siv tau?

Video: Cov qauv twg rau daim duab peb sab congruence tuaj yeem siv tau?

Video: Cov qauv twg rau daim duab peb sab congruence tuaj yeem siv tau?
Video: Saib Mis paub Poj niam (hluas nkauj) tus yam ntxwv lub siab 2024, Kaum ib hlis
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Kev txiav txim siab kev sib haum xeeb

  • SAS (Side-Angle-Side): Yog ob khub ntawm ob sab ntawm ob daim duab peb sab yog sib npaug ntawm qhov ntev, thiab cov kaum sib npaug sib npaug hauv kev ntsuas, ces tus daim duab peb sab yog kev sib haum xeeb .
  • SSS (Side-Side-Side): Yog peb khub ntawm ob sab daim duab peb sab yog sib npaug ntawm qhov ntev, ces tus daim duab peb sab yog kev sib haum xeeb .

Ib yam li ntawd, cov txheej txheem twg rau daim duab peb sab congruence tso cai rau koj tam sim ntawd?

Los ntawm daim duab peb tau txais cov kab nruab nrab yog ib qho rau ob qho no daim duab peb sab . Tom qab ntawd lwm lub ntsiab lus muab yog qhov hypotenuse ntawm ob daim duab peb sab yog kev sib haum xeeb . Los ntawm HL cov txheej txheem rau daim duab peb sab congruence tso cai rau tam sim ntawd xaus tias cov daim duab peb sab yog kev sib haum xeeb.

Ib yam li ntawd, 4 qhov kev xeem ntawm kev sib haum xeeb hauv daim duab peb sab yog dab tsi? SSS , SAS , UA, AAS , thiab HL. Cov kev ntsuam xyuas no piav qhia txog kev sib txuas ntawm ob sab sib koom ua ke thiab / lossis cov kaum sab xis uas siv los txiav txim siab seb ob daim duab peb sab puas sib haum.

Ua raws li qhov no, cov txheej txheem twg rau daim duab peb sab congruence tuaj yeem siv los ua pov thawj ob peb daim duab peb sab hauv qab no yog congruent?

Ob sab ntawm ib daim duab peb sab yog sib npaug rau coj ob sab ntawm lwm yam daim duab peb sab . Ib sab yog muaj nyob rau hauv ob qho tib si daim duab peb sab . Thaum peb sab ntawm ib daim duab peb sab yog sib npaug rau peb sab ntawm lwm yam daim duab peb sab ces cov daim duab peb sab yog kev sib haum xeeb los ntawm SSS postulate. Li no, lub khub ntawm daim duab peb sab yog kev sib haum xeeb los ntawm SSS postulate.

Cov duab peb sab twg yuav tsum sib haum?

Triangles yog congruent yog tias:

  • SSS (sab sab sab) Tag nrho peb sab sib txuas yog sib npaug ntawm qhov ntev.
  • SAS (sab kaum sab xis) Ib khub ntawm sab sib raug thiab lub kaum sab xis suav sib npaug.
  • ASA (lub kaum sab xis)
  • AAS (lub kaum sab xis sab)
  • HL (hypotenuse ceg ntawm txoj cai daim duab peb sab)

Pom zoo: