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Yuav ua li cas koj pom cov ces kaum hauv parallelogram?
Yuav ua li cas koj pom cov ces kaum hauv parallelogram?

Video: Yuav ua li cas koj pom cov ces kaum hauv parallelogram?

Video: Yuav ua li cas koj pom cov ces kaum hauv parallelogram?
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Properties ntawm parallelograms

  1. Cov sab nraud yog congruent (AB = DC).
  2. Cov tubtxib saum ntuj yog congruent (D = B).
  3. Sib law liag lub kaum sab xis yog ntxiv (A + D = 180 °).
  4. Yog ib lub kaum sab xis yog lawm, ces tag nrho lub kaum sab xis yog lawm.
  5. Diagonals ntawm a parallelogram sib sib.
  6. 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.

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