Kusebuntwaneni, sabala isikwele ngaphandle kwezifundo zeMathematics. Empilweni yabantu abadala esinesidingo esinjalo, sibhekene nalapho senza ukulungiswa, sihlela ukubeka ukuqondanisa kwefenisha noma samukela ifulethi kusuka kunjiniyela.
"Thatha futhi wenze" kukhombisa ukuthi ungabalwa kanjani kahle indawo yokwakheka kwejometri ejwayelekile: unxande, isikwele, umbuthano, unxantathu kanye ne-trapezium.
Indlela yokubala indawo yoxande
Ukubala indawo yoxande, udinga ukwandisa ubude besibalo ububanzi. Ake sithi silinganisa indawo yegumbi. Kuyi-6 m ubude, futhi ububanzi - 3 m. Ngiphindaphinde i-6 kuye ku-3 futhi ngithole indawo yegumbi - amamitha-skwele angama-18. m.
Ungabalwa kanjani
Indawo yesikwele ibalwa ngendlela efanayo: ubude bawo buphindwe ngobubanzi. Kepha, njengoba sazi, amaqembu alesi sibalo ayalingana. Ngakho-ke, indlela ifomula yehlela ekwakhiweni kwenye yamaqembu esigcawini.
Indlela yokubala indawo yombuthano
Kunzima kakhulu ukubala indawo yombuthano. Ukuze wenze lokhu, udinga ukwazi irediyo yaso, elingana nengxenye yobubanzi. Ububanzi uqobo buyingxenye exhuma amaphoyinti ama-2 embuthanweni bese udlula esikhungweni sawo. Ukubala indawo, ukukala ububanzi bese uhlukanisa umphumela otholwe ngo-2. Kusele ukukhumbula ukuthi umphumela wokubalwa ngeke ube ne-all anemba ngokuphelele, ngoba inombolo ye-PI inenani elilinganisiwe. Ake sithi sibala indawo yokuphuma kophahla lokuhlobisa ngaphansi kwe-chandelier. Linganisa okokuqala ububanzi bawo. Makube lilingane no-0.46 m. Sihlukanisa ku-2 futhi sithole inani lemisebe ye-0.23 m. Sizokwakhiwa esikweleni: 0.23 * 0.23 = 0.0529. Ngemuva kwalokho phinda ngenombolo ye-PI: 3.14 * 0.0529 = 0.1661. Ngenxa yalokho, indawo ephumayo yi-0.1661 skwele metres. m.
Indlela yokubala indawo kanxantathu ofanele
Bala indawo kanxantathu ofanele noma olinganayo - umsebenzi uyinkimbinkimbi ngokwengeziwe. Ifomula ibukeka kanjena: Impande yesikwele engu-3 ihlukaniswe yaba ngu-4 futhi iphindaphindeka ngobude benhlangothi elithile esigcawini. Sikwenza lula ingxenye yokuqala: Impande yesikwele engu-3 icishe ibe ngu-1.732. Sihlukanisa umphumela ngo-4, sithola cishe ngo-0.433. Lesi sibalo yingxenye engaguquki yefomula. Manje sithatha ubude bezinhlangothi (makube lilingane nama-20 cm), sizokwakhiwa esigcawini bese siphindaphindeka ngo-0.433. Sithola le ndawo - amamitha-skwele angama-173.2. cm.
Indlela yokubala indawo kanxantathu onxande
Ngonxantathu ongunxande, konke kulula: Phindaphinda u-1/2 emsebenzini wamakhulu amakhulu (amaqembu asondelene ne-Direct Corner). Isibonelo, uma uhlangothi oluhlangothini lwenxantathu lungama-6 cm, kanti ongezansi lungu-4 cm, khona-ke indawo yalo sibala lokhu: 1/2 (6 * 4) = 12 kV. cm.
Indlela yokubala isikwele se-trapez
Ukuthola indawo ye-trapezium, hlukanisa ukuphakama kwayo kube 2 bese kuphindaphinda inani lezinhlangothi. Isibonelo, uma ukuphakama kwe-trapezium kungu-4 cm, uhlangothi olungaphezulu lungama-3 cm, kanti ongezansi kungu-6 cm, ke ngokusho kwefomula: h / 2 (B1 + B2) ukubalwa kwendawo ye Umdwebo ubukeka kanjena: 4/2 (3 + 6) = 2 * 9 = 18.
