Ungayifumana njani isikwere sesikwere ngapha nangapha kunye nokudibanisa kwayo?

Namhlanje, bambalwa abantu abazi indlela yokufumana indawo yesikwere. Nangona hayi, bekusekude kusekude ... oko kukuthi, ngexesha apho wonke umntu wayekwazi ukubala indawo yesikwere, kuba namhlanje, nangona kunjalo kungathi kunangqiqo, le mibuzo ihlale ibonakala kwi-intanethi. Kuyinto engaqhelekanga, ukuba akunjalo - iyantyisayo.

Kwaba esikolweni samabanga aphansi bafundisa indlela yokufumana indawo yesikwere. Kodwa okokuqala kufuneka ufunde ukucacisa indawo yamacangca (kwaye isikwere sisengxande, kuphela ngamacala alinganayo).

Kuphakanyisiwe ukuba kuthathe isiseko somlinganiselo othile wesigcawu sendawo - isikwere sendawo okanye imitha yesikwere. Lo mda wendawo yesikwere kunye nelinye icala elilingana neyinye inentimitha okanye enye imitha. Ngokuxhomekeka kubukhulu bommandla omele ulinganiswe ngawo, ingaba ihektare (ikhilomitha eliqhelekileyo) okanye i-ar (isikwere ngaphaya kweemitha ezili-100, kwelinye - "ukuguqa"). Ezi zithuba zigcinwe ngengqondo kumxande olinganisiweyo.

Kulo vavanyo, thabatha ikhonteli elincinane ngamacala, umzekelo, ulingana no-3 no-5 cm. Ukuze kucaciswe, abantwana besikolo bayakhuthazwa ukuba bafake umfanekiso kumakhredithi, baze bahlule ixande ngokulandelana kwemizila eqondekileyo ubude nobubanzi, bebeka emgama wamaseli amabini. Ngokuqinisekileyo, iiseli ezimbini kwincwadi yeqhelekileyo yesikolo zihambelana nesentimitha enye. Ngaloo ndlela, kuvela ukuba ixande lihlukaniswe libe ngamasentimitha angama-square, oko kukuthi, iisentimitha ezi-square zifakwa kuyo-amanyathelo okulinganisa kuloo ndawo.

Isinyathelo esilandelayo kukubala izikwere ezifake kwixande kunye necala lomitha omnye. Unokuqala ukubalandisa ngendlela eqhelekileyo, ekhomba intonga nganye. Kodwa ke kuyimfuneko ukusebenzisa itheyibhile yokuphindaphinda sele ifundile: Kufunyenwe imivalo emihlanu, ngasinye kwisithathu. Ukuziphinda, sizifumana kalula iisentimitha ezili-15 zesentimitha. Ngokwemigaqo elula, indawo nayiphi na udangxube iyanda ngenxa yobude nobubanzi bayo.

Ukutshintshwa kwenombolo 5 ngokuthi "a", kunye nenombolo 3 ngokuthi "b", abantwana banokufumana kalula umgaqo wokufumana indawo yexande. Ngoko, kuvela ukuba i-S = isicatshulwa b. Kodwa le ndlela ifomati. Kwakhona kufuneka sifunde umgaqo ochaza indlela yokufumana indawo yesikwere!

Ewe, kulula kakhulu! Amacala omgca alinganayo, ngoko ungatshintsha indawo "b" kule fom nge "". Emva koko ibonakaliso elandelayo isiphumo: S = xhawula. Ukuphindaphinda kwenani ngokwalo kuthatha isikwere sale nombolo okanye inombolo kwinxalenye yesibini.

Nangona kunjalo, kukho ezinye iindlela zokufumana i square square. Oku, kunjalo, kunoko umsebenzi wemathematika. Kodwa zixazulula iifomula ezithile. Umzekelo, ucelwa ukuba ufumanise indlela Fumana isikwere sesikwere Akunalo kwicala, kodwa kwi-diagonal yayo.

Ukujongisa le ngxaki, akukho nolwazi oluncinane lwesikolo esiprayimari. Sidinga i-Pythagorean theorem. Okokuqala, sakha isikwere, umzekelo, i-NMOP ene-diagonal NO = m. Sifumana ama-isosceles alinganayo alunxwemeni alungileyo kunye ne-base m.

Ukusetyenziswa kwesi sakhiwo esingasentla, sifumana kwicala lexantathu elungileyo. I-NM isikwele + MO squared = AYI-square. Kodwa ukususela ku-NM = MO, sifumana i-NM isikwele + i-NM squared = AYI-square. Ngako-ke 2 i-NM kwisikwele = AYI-square. Fumana i-NM kwisikwere inokuhlulwa ngokungabi ne-squared zibe ezimbini.

Kodwa i-NM i-square - yile mpendulo ngqo kumbuzo wendlela yokufumana indawo yesikwere! KUNYE i-diagonal yesikwere. Ngenxa yoko, sinokufumana ifomula entsha ngokuthi indawo yesikwere ilingana nesiqingatha se-diagonal ephakanyiswe kumandla wesibini.

Kuyakwazi ukufumana ifom yokufumana indawo yesikwere ecaleni kwesaqadi esibhaliweyo kuyo, okanye ichazwe ngeenxa zonke. Kodwa nawuphi na umsebenzi esiwugqibayo ukwenza, isiseko sihlala sisigxina esikufundayo esikolweni esiprayimari-ukuba ngokuphindaphinda emacaleni amabini ekhoneni, unokufumana indawo yalo.