Yongeza weenceke
 
Shenxisa imke weenceke

Yomjikelezo unxantathu, iingcingo sokubala ifomula

Yomjikelezo unxantathu, iingcingo sokubala ifomula ikuvumela ukuba ufumane obungama iintlobo ezahlukeneyo zoonxantathu, ezifana alinganayo, ayisoselisi, ekunene okanye unxantathu scalene, nge formula, usebenzisa ubude macala kanxantathu.
Ecaleni:   Side B:   Side C:  

Umjikelezo kanxantathu

Triangle yi yepholigoni kunye iikona ezintathu, ingadibene kwilayini enye, edibene elintlangothi ezintathu.
Formula for odonga kanxantathu: P=a+b+c,
apho, b, c - emacaleni unxantathu