Yongeza weenceke
 
Shenxisa imke weenceke

Umjikelezo ngoxande, iingcingo sokubala ifomula

Umjikelezo ngoxande, iingcingo ifomula sokubala ikuvumela ukuba ufumane obungama luxande, nge formula, usebenzisa ubude macala uxande.
a:   b:  

Umjikelezo ngoxande

Awafani Ikwadrilatherali kunye engile ezine. Formula for odonga yoxande: P=2(a+b),
apho, b - amacala ngoxande