7SAB AL JODAE AL SOLAMI :
AB. AC = AB.AB = AB² = //AB//² = a²
AB.CD = AB.-AB = -AB² = -//AB//² = -a²
AB.FG = AB.FF = AB.0 = 0
DB.GC = DB.CC = DB.0 = 0
ED. EC = ED.ED = ED² = //ED//² = 2a²
DB.FF = DB.DB = DB² = //DB//² = 2a²
7SABE MA YLI :
AG.BE = AF.BE = 0
AG.BD = AC.BD =0
ESTINTADJ ANA LMOSTA9IM (AG) 3AMODI 3LA LMOSTAWI (BED) :
AG.BE =0 AG 3AMODI 3LA BE
AG.BD =0 AG 3AMODI 3LA BD
BMA ANA AL CHO3A3 AG 3AMOUDI 3LA KOL MN CHO3A3AIN BE WA BD GAIR MORTABITIN 5ATIAN FAINA (AG) 3AMOUDI 3LA AL MOUSTAWI ALADI YACHMOL HADAINI AL CHO3A3ANE AY ANA (AG) YO3AMD (BED)