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Video: Yuav ua li cas koj pom cov ces kaum hauv parallelogram?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Properties ntawm parallelograms
- Cov sab nraud yog congruent (AB = DC).
- Cov tubtxib saum ntuj yog congruent (D = B).
- Sib law liag lub kaum sab xis yog ntxiv (A + D = 180 °).
- Yog ib lub kaum sab xis yog lawm, ces tag nrho lub kaum sab xis yog lawm.
- Diagonals ntawm a parallelogram sib sib.
- Txhua kab pheeb ces kaum ntawm a parallelogram cais nws mus rau hauv ob daim duab peb sab.
Tsis tas li ntawd, dab tsi yog tag nrho ntawm cov ces kaum hauv parallelogram?
Parallelogram . A Parallelogram yog ib tug flatshape nrog opposite sab parallel thiab sib npaug ntawm qhov ntev. Lub kaum sab xis "a" thiab "b" ntxiv txog 180 °, yog li lawv ntxiv lub kaum sab xis . CEEB TOOM: Squares, Rectangles thiab Rhombuses yog tag nrho Parallelograms !
Tsis tas li ntawd, koj yuav pom qhov ntsuas ntawm parallelogram li cas? Cov sab nraud yog sib npaug hauv ntev thiab oppositeangles yog sib npaug hauv ntsuas . Rau nrhiav thaj tsam ntawm a parallelogram , muab lub hauv paus los ntawm qhov siab. Cov formulais: A = B * H qhov twg B yog lub hauv paus, H yog qhov siab, thiab * txhais tau tias ntau.
Xav txog qhov no, puas tag nrho cov ces kaum hauv ib qho parallelogram ntxiv txog 360?
Nws plaub sab hauv cov ces kaum ntxiv rau 360 ° thiab ob qho tib si nyob ib sab lub kaum sab xis yog supplementary, txhais tau tias lawv ntxiv rau 180 °. Rov qab (tsis nyob ib sab) lub kaum sab xis zoo sib xws. Ob lub diagonals ntawm a parallelogram sib sib.
Puas yog trapezoids parallelograms?
Ib txhia txhais a trapezoid Raws li ib qho plaub ntug uas tsuas muaj ib khub ntawm qhov sib npaug sab (lub ntsiab txhais tshwj xeeb), yog li tsis suav nrog parallelograms . Nyob rau hauv lub ntsiab txhais, tag nrho parallelograms (xws li rhombuses, duab plaub thiab squares) yog trapezoids.
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
Yuav ua li cas koj nrhiav tau tus kab pheeb ces kaum ntawm txoj cai kaum sab xis?
Txhawm rau nrhiav qhov ntev ntawm kab pheeb ces kaum (orhypotenuse) ntawm txoj cai daim duab peb sab, hloov qhov ntev ntawm ob sab perpendicular rau hauv cov mis a2 + b2 = c2, qhov twg a thiab b yog qhov ntev ntawm sab perpendicular thiab c yog qhov ntev ntawm lub hypotenuse
Koj yuav daws tau qhov teeb meem linear programming li cas los ntawm txoj kev ntawm cov ces kaum?
METHOD OF CONNERS Khiav cov teeb tsa ua tau (tej thaj tsam), S. Nrhiav qhov EXACT coordinates ntawm tag nrho cov vertices (kaum cov ntsiab lus) ntawm S. Ntsuas lub hom phiaj muaj nuj nqi, P, ntawm txhua vertex Qhov siab tshaj plaws (yog tias muaj) yog qhov loj tshaj ntawm tus nqi ntawm P ntawm vertex. Qhov tsawg kawg nkaus yog qhov tsawg tshaj plaws tus nqi ntawm P ntawm vertex
Yuav ua li cas koj thiaj nrhiav tau cov ces kaum sib txawv?
Ib qho ntawm cov ces kaum sib xws yog ib txwm sab hauv (hauv nruab nrab ntawm cov kab sib txuas) thiab lwm qhov - sab nrauv (sab nraum cheeb tsam hauv nruab nrab ntawm cov kab sib txuas). Ob lub kaum sab xis a thiab c', tsim los ntawm cov kab sib txawv sib txawv thaum sib tshuam los ntawm kev hloov pauv, pw ntawm sab nraud los ntawm kev sib hloov, yog hu ua alternate
Yuav ua li cas cov khoom siv caj ces hauv txhua lub xov tooj tshiab tsim los ntawm kev faib tawm ntawm tes sib piv nrog cov khoom siv caj ces hauv lub xov tooj qub?
Mitosis tshwm sim nyob rau hauv ob lub nuclei uas zoo tib yam rau thawj nucleus. Yog li, ob lub hlwb tshiab tsim tom qab kev faib tawm ntawm tes muaj tib yam khoom siv caj ces. Thaum lub sij hawm mitosis, chromosomes condense los ntawm chromatin. Thaum saib nrog lub microscope, chromosomes pom nyob rau hauv lub nucleus