Okuqukethwe
Le ncwadi iveza izibali eziku-inthanethi namafomula okubala indawo kanxantathu ngokwedatha ehlukahlukene yokuqala: ngesisekelo nokuphakama, izinhlangothi ezintathu, izinhlangothi ezimbili kanye ne-engeli ephakathi kwazo, izinhlangothi ezintathu kanye nerediyasi yombuthano obhaliwe noma osokiwe. .
Ukubalwa kwendawo
Imiyalo yokusetshenziswa: faka amanani aziwayo, bese ucindezela inkinobho “Bala”. Ngenxa yalokho, indawo kanxantathu izobalwa.
1. Ngokusebenzisa isisekelo nokuphakama
Ifomula yokubala
2. Ngobude bezinhlangothi ezintathu (ifomula kaHeron)
Qaphela: uma umphumela ungu-zero, khona-ke izingxenye ezinobude obucacisiwe azikwazi ukwenza unxantathu (kulandela kusuka kuzakhiwo).
Indlela yokubala:
p - i-semi-perimeter, ebhekwa kanjena:
3. Ngezinhlangothi ezimbili kanye ne-engeli phakathi kwazo
Qaphela: i-engeli enkulu kuma-radians akufanele ibe nkulu kuno-3,141593 (inani elilinganiselwe lenombolo π), ngamadigri - kufika ku-180 ° (kuphela).
Ifomula yokubala
4. Ngokusebenzisa i-radius yendilinga ezungezile kanye nohlangothi
Ifomula yokubala
5. Ngokusebenzisa i-radius yendilinga eqoshiwe kanye nohlangothi
Ifomula yokubala
