Izinhlobo Ezi-7 Zonxantathu: Ukuhlukaniswa Ngokwezinhlangothi Nezingeli Lazo

-Delile

• Isimo sejiyomethri esingahlukaniswa ngokuya ngezici ezahlukahlukene.
• Ukusebenziseka konxantathu
• Yini unxantathu
• Ungayithola kanjani ipherimitha nendawo kanxantathu
• Bahlukaniswa kanjani onxantathu
• Onxantathu ngokuya ngobude bezinhlangothi zabo
• 1. Unxantathu olinganayo
• 2. Unxantathu weScalne
• 3. Isosceles unxantathu
• Onxantathu ngokwama engeli abo
• 4. Unxantathu ongakwesokudla
• 5. unxantathu we-obtuse
• 6. Unxantathu obukhali
• 7. Unxantathu olinganayo
• isiphetho

Isimo sejiyomethri esingahlukaniswa ngokuya ngezici ezahlukahlukene.

Ngesikhathi sobuntwana bethu, sonke kuye kwadingeka ukuthi siye emakilasini ezifundo zezibalo esikoleni, lapho kudingeke sifunde izinhlobo ezahlukene zonxantathu. Kodwa-ke, njengoba iminyaka ihamba, singakhohlwa ezinye zezinto esizifundile. Kwabanye abantu izibalo kungumhlaba othakazelisayo, kepha abanye bathokozela umhlaba wezinhlamvu kakhulu.

Kulesi sihloko sizobuyekeza izinhlobo ezahlukene zonxantathu, ngakho-ke kungasiza ukuvuselela eminye imiqondo efundwe esikhathini esedlule noma ukufunda izinto ezintsha ebezingaziwa.

Ukusebenziseka konxantathu

Kwi-mathematics, i-geometry iyafundwa, futhi icubungula izibalo zejometri ezihlukile njengonxantathu. Lolu lwazi lusizo ngezizathu eziningi; isibonelo: ukwenza imidwebo yobuchwepheshe noma ukuhlela indawo yokwakha nokwakhiwa kwayo.

Ngalo mqondo, futhi ngokungafani nonxande ongaguqulwa ube yi-parallelogram lapho amandla esetshenziswa kolunye uhlangothi lwawo, izinhlangothi zonxantathu zilungisiwe. Ngenxa yobulukhuni bezimo zayo, ososayensi bakhombisile ukuthi unxantathu uyakwazi ukumelana namandla amaningi ngaphandle kokukhubazeka. Ngakho-ke, abaklami bonjiniyela basebenzisa onxantathu lapho besakha amabhuloho, uphahla ezindlini nakwezinye izakhiwo. Lapho onxantathu bakhelwe ezakhiweni, ukumelana kuyanda ngokunciphisa ukunyakaza kwe-lateral.

Yini unxantathu

Unxantathu uyipoligoni, isibalo esiyisicaba sejiyometri esinendawo kodwa esingenayo ivolumu. bonke onxantathu banezinhlangothi ezintathu, ama-vertices amathathu nama-engeli angaphakathi amathathu, futhi ingqikithi yalokhu ingu-180º

Unxantathu wakhiwa:

Kulezi zibalo, uhlangothi olulodwa lwalesi sibalo luhlala lungaphansi kwesibalo sezinye izinhlangothi ezimbili, futhi kunxantathu onamacala alinganayo, ama-engeli ahlukile nawo ayalingana.

Ungayithola kanjani ipherimitha nendawo kanxantathu

Izilinganiso ezimbili esinesifiso sokwazi ngazo onxantathu yipherimitha nendawo. Ukubala eyokuqala, kuyadingeka ukwengeza ubude bazo zonke izinhlangothi zayo:

P = a + b + c

Esikhundleni salokho, ukuthola ukuthi iyiphi indawo yalesi sibalo, kusetshenziswa ifomula elandelayo:

A = ½ (bh)

Ngakho-ke, indawo kanxantathu isisekelo (b) ukuphakama kwezikhathi (h) kuhlukaniswe kabili, futhi inani elivelayo lalesi sibalo livezwa ngamayunithi ayisikwele.

Bahlukaniswa kanjani onxantathu

Kunezinhlobo ezahlukahlukene zonxantathu, futhi zona zihlukaniswa kucatshangelwa ubude bezinhlangothi zazo nobubanzi bama-engeli azo. Ngokubheka izinhlangothi zayo, kunezinhlobo ezintathu: i-equilateral, isosceles ne-scalene. Ngokuya ngama-engeli abo, singahlukanisa onxantathu abalungile, abathathekile, nama-equiangular.

Siqhubeka sibanikeze imininingwane ngezansi.

Onxantathu ngokuya ngobude bezinhlangothi zabo

Ngokubheka ubude bezinhlangothi, onxantathu bangaba izinhlobo ezahlukene.

1. Unxantathu olinganayo

Unxantathu olinganayo unezinhlangothi ezintathu zobude obulinganayo, okwenza kube ipholigoni ejwayelekile. Ama-engeli kunxantathu olinganayo nawo ayalingana (60º lilinye). Indawo yalolu hlobo lonxantathu iyimpande ka-3 ngokuphindwe kane ubude bohlangothi oluphindwe kabili. I-perimeter ingumkhiqizo wobude bohlangothi olulodwa (l) nobathathu (P = 3 l)

2. Unxantathu weScalne

Unxantathu we-scalene unezinhlangothi ezintathu zobude obuhlukile, futhi ama-engeli alo nawo anezinyathelo ezahlukahlukene. Umjikelezo ulingana nesamba sobude bezinhlangothi zawo ezintathu. Lokho kungukuthi: P = a + b + c.

3. Isosceles unxantathu

Unxantathu we-isosceles unamacala amabili alinganayo nama-engeli amabili, futhi indlela yokuthola umjikelezo wayo yile: P = 2 l + b.

Onxantathu ngokwama engeli abo

Onxantathu bangabuye bahlukaniswe ngokobubanzi bama-engeli abo.

4. Unxantathu ongakwesokudla

Zibonakala ngokuba ne-engeli yangaphakathi elungile, nenani lika-90º. Imilenze izinhlangothi ezakha le engela, kuyilapho i-hypotenuse ifana nohlangothi oluphambene. Indawo yale nxantathu ingumkhiqizo wemilenze yayo ihlukaniswe kabili. Lokho kungukuthi: A = ½ (bc).

5. unxantathu we-obtuse

Lolu hlobo lonxantathu lune-engeli enkulu kuno-90 ° kepha ingaphansi kuka-180 °, ebizwa nge- "obtuse", nama-engeli amabili abukhali, angaphansi kuka-90 °.

6. Unxantathu obukhali

Lolu hlobo lonxantathu lubonakala ngama-engeli alo amathathu angaphansi kuka-90 °

7. Unxantathu olinganayo

Ngunxantathu olinganayo, ngoba ama-engeli angaphakathi alingana no-60 °.

isiphetho

Cishe sonke sifunde i-geometry esikoleni, futhi sijwayele onxantathu. Kepha ngokuhamba kweminyaka, abantu abaningi bangakhohlwa ukuthi ziyini izici zabo nokuthi zihlukaniswa kanjani. Njengoba ubonile kule ndatshana, onxantathu bahlukaniswa ngezindlela ezahlukahlukene kuye ngobude bezinhlangothi zabo nobubanzi bama-engeli abo.

IJiyomethri yisifundo esifundwa ngezibalo, kepha akuzona zonke izingane ezijabulelayo ngalesi sifundo. Eqinisweni, abanye banezinkinga ezinkulu. Ziyini izimbangela zalokhu? Esihlokweni sethu "Ubunzima bezingane ekufundeni izibalo" siyakucacisa.