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Dab tsi yog qhov sib thooj ntawm daim duab peb sab sib dhos?
Dab tsi yog qhov sib thooj ntawm daim duab peb sab sib dhos?

Video: Dab tsi yog qhov sib thooj ntawm daim duab peb sab sib dhos?

Video: Dab tsi yog qhov sib thooj ntawm daim duab peb sab sib dhos?
Video: zoo nyob tag npaum no xoom ceev2 kom phev los tso mam saib seb yog leej twg 2024, Lub peb hlis ntuj
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Qhov sib thooj ntawm cov duab peb sab sib dhos yog Kev sib haum xeeb

Nws txhais tau hais tias yog ob trangles paub tias yog kev sib haum xeeb , ces tag nrho sib raug kaum / sab kuj yog kev sib haum xeeb . Piv txwv li, yog tias 2 daim duab peb sab yog kev sib haum xeeb los ntawm SSS, ces peb kuj paub tias cov ces kaum ntawm 2 daim duab peb sab yog kev sib haum xeeb.

Xav txog qhov no, dab tsi yog qhov sib thooj ntawm daim duab peb sab?

Sib raug sab . Sib raug sab kov tib ob lub kaum ntse ntse. Thaum lub sab yog sib raug txhais tau tias mus ntawm ib qho daim duab peb sab rau lwm tus koj tuaj yeem sib ntxiv txhua sab los ntawm tib tus lej. Hauv daim duab zoo sib xws daim duab peb sab tus sib raug sab yog tib xim.

Tsis tas li ntawd, cov lus hais txog qhov sib thooj ntawm daim duab peb sab yog congruent raws li? Kev sib haum xeeb ntawm daim duab peb sab . Ob triangles yog congruent yog lawv sib raug sab yog sib npaug ntawm qhov ntev, thiab lawv sib raug cov ces kaum sib npaug hauv kev ntsuas.

Ua li no, SSS SAS ASA AAS yog dab tsi?

Qhov "suav nrog lub kaum sab xis" hauv SAS yog lub kaum sab xis tsim los ntawm ob sab ntawm daim duab peb sab siv. Qhov "nrog rau sab" hauv ASA yog ib sab ntawm cov ces kaum siv. Thaum daim duab peb sab yog pov thawj congruent, cov seem "qhov" uas tsis tau siv nyob rau hauv SSS , SAS , ASA , AAS thiab HL, kuj sib haum.

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)

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