Show life that you have a thousand reasons to smile
© Copyright 2024 DOKU.TIPS - All rights reserved.
ABCD - romb
=> AB|| CD=>AB=DC(vectori)
=> BC|| AD=>BC=DA(vectori
BA+BC=BA+AD=BD(vectori)
AD+DC=AD+AB=DB(vectori)
produsul scalar:BD*DB(vectori)= BD*DB*cos(BD,DB)=0