Okuqukethwe
Kulesi sihloko, sizocubungula incazelo kanye nezakhiwo zikanxantathu olinganayo (ovamile). Sizophinde sihlaziye isibonelo sokuxazulula inkinga ukuze sihlanganise indaba yetiyori.
Incazelo kanxantathu olinganayo
Kuyafana (noma kulungile) ibizwa ngokuthi unxantathu lapho zonke izinhlangothi zinobude obufanayo. Labo. AB = BC = AC.
Qaphela: Ipholigoni evamile iyipholigoni eyi-convex enezinhlangothi nama-engeli alinganayo phakathi kwawo.
Izici zikanxantathu olinganayo
Impahla 1
Kunxantathu olinganayo, wonke ama-engeli angu-60°. Labo. α = β = γ = 60°.
Impahla 2
Kunxantathu olinganayo, ukuphakama okudonseleka nhlangothi zombili kuyi-engeli ephindwe kabili ye-engeli edonswe kuyo, kanye ne-median ne-perpendicular bisector.
CD – i-median, ubude kanye ne-perpendicular bisector eceleni AB, kanye ne-engeli ephindwe kabili I-ACB.
- CD i-perpendicular AB => ∠ADC = ∠BDC = 90°
- AD = DB
- ∠ACD = ∠DCB = 30°
Impahla 3
Kunxantathu olinganayo, ama-bisectors, ama-medians, ukuphakama kanye ne-perpendicular bisectors edwetshwe kuzo zonke izinhlangothi iyaphambana ngesikhathi esisodwa.
Impahla 4
Izikhungo zendilinga eqoshiwe nesokiwe ezungeze unxantathu olinganayo ziyaqondana futhi zisempambanweni yama-medians, ubude, ama-bisectors kanye nama-perpendicular bisectors.
Impahla 5
Irediyasi yendilinga ezungeza unxantathu olinganayo iphindwe izikhathi ezi-2 kunobubanzi bendilinga ebhaliwe.
- R iyindawo engaba yindilinga eyisiyingi;
- r iyindawo engaba yindilinga eqoshiwe;
- R = 2r.
Impahla 6
Ngonxantathu olinganayo, ukwazi ubude bohlangothi (sizoyithatha ngokwemibandela njenge "kuya"), singabala:
1. Ubude/i-median/i-bisector:
2. Irediyasi yombuthano oqoshiwe:
3. Irediyasi yombuthano osokiwe:
4. I-perimeter:
5. Indawo:
Isibonelo senkinga
Unxantathu olinganayo unikezwa, uhlangothi lwawo oluyi-7 cm. Thola i-radius yombuthano osokiwe futhi obhaliwe, kanye nokuphakama kwesibalo.
Isixazululo
Sisebenzisa amafomula anikezwe ngenhla ukuze sithole amanani angaziwa:
