Yuav ua li cas yog lub thawv? Kev mob ntawm tus duab plaub

Geography, biology, chemistry, algebra, geometry ... Cov menyuam kawm ntawv muaj mus nrog ib tug ntau ntawm cov ntaub ntawv los ntawm ib tug ntau yam ntawm sciences. Txawm li cas los, muaj tej yam ntawm kev txawj ntse, uas yog yooj yim txaus los to taub, paub txog lawv cov kev cai lij choj. Cov muaj xws li cov kev ntsuas. Yuav kom paub tag nrho cov ntsiab lus ntawm no science, nws yog tsim nyog mus ntsib nrog nws tsim, axioms. Tom qab tag nrho, tsis muaj cov me nyuam yaus ntawm geometry nowhere.

txhais los ntawm ib tug duab plaub

Duab plaub - ib tug duab zoo nrog plaub txoj cai ces kaum. Lus Txhais yog yooj yim heev, tab sis tsis xav hais tias cov tub ntxhais kawm tsis muaj teeb meem nrog cov kev kawm txog tej yam xws, vim hais tias muaj ib tug xov tooj ntawm cov nta. Lub qhov ntev ntawm tus duab plaub nyob ntawm seb qhov ntev ntawm nws sab, uas yog feem ntau denoted los ntawm Latin cov tsiaj ntawv thiab ib tug thiab b.

duab plaub zog

• sab dag tiv thaiv txhua lwm yam yog muaj sib npaug thiab thaum uas tig mus;
• kab pheeb ces kaum nuj nqis yog muaj sib npaug;
• lub point ntawm kev tshuam ntawm lub diagonals faib lawv nyob rau hauv ib nrab;
• duab plaub yuav tsum tau muab faib ua ob sib npaug zos txoj cai cov vajvoos peb sab.

tej yam tshwm sim ntawm ib tug duab plaub

Muaj tsuas yog peb feature muaj los ntawm ib tug duab plaub. Ntawm no lawv muaj li no:

• parallelogram nrog sib npaug diagonals - ib tug duab plaub;
• parallelogram nrog ib txoj cai lub - nws yog ib tug duab plaub;
• quadrangle nrog peb txoj cai ces kaum - ib tug duab plaub.

Ib me ntsis ntxiv nthuav

Yog li ntawd, dab tsi yog ib tug duab plaub, nws yog tam sim no kom meej, tab sis yog dab tsi luag hauj lwm nws plays nyob rau hauv lub geometric teeb meem thiab ntsuam nyob rau hauv kev xyaum muaj tsis tau to taub. Yog li ntawd, ua ntej ntawm tag nrho cov kuv yuav tsum hais tias qhov no yog qhov yooj yim tshaj plaws geometric duab, uas koj peev xwm faib lub cheeb tsam mus rau hauv khej thiab nyob rau hauv qhib chaw, thiab nyob hauv tsev. Yuav ua li cas yog lub thawv? Raws li koj paub, nws yog ib tug quadrangle. Muaj ntau ntau ntau ntau yam ntawm lub caij nyoog kawg no, cov uas yog cov trapeze (tsuas yog ob tug sab sib npaug), ib tug parallelogram (opposite thaum uas tig mus sab), square (tag nrho cov ces kaum thiab sab ntawm tib yam), pob zeb diamond (parallelogram nrog sib npaug sab), thiab lwm tus neeg. Qhov tshwj xeeb cov ntaub ntawv ntawm ib tug duab plaub yog ib tug square, nyob rau hauv uas tag nrho cov ces kaum yog txoj cai ces kaum, thiab cov sab yog muaj sib npaug.

Peb tsis tau hais tias qhov no duab plaub, tsis hais yuav ua li cas los mus txiav txim qhov luaj li cas. Lub cheeb tsam ntawm no geometrical daim duab yog xav tau cov khoom ntawm nws cov dav los ntawm qhov ntev thiab lub perimeter ntawm lub tib yam li hais tias ntawm txhua daim duab, sib npaug zos rau cov sum ntawm cov lengths ntawm tag nrho cov sab. Nyob rau hauv cov ntaub ntawv no, nws kuj sib npaug zos rau ob zaug lub sum ntawm qhov ntev thiab dav, vim hais tias cov opposing sab ntawm lub duab plaub yog muaj sib npaug. Tam sim no koj paub dab tsi ib tug duab plaub thiab hais tias ua li cas nrog nws, daws teeb meem thiab kev kawm lub secrets ntawm no mysterious thiab mysterious science, raws li ntsuas.