Question

Pls sa mă ajute cineva...​

Answer 1

Răspuns:

a)Diagonalele paralelogramului se înjumtasesc =>AC=15 CM•2=30CM,BD=20 CM •2=40CM,AC+BD=30 CM+40 CM =70 CM

b)AO=20CM

OB=2 supra 5•AO

OB=8CM

BD=OB•2

BD=16CM

AC=AO•2

AC=20•2=40CM

AC+BD=16 CM+40CM=56CM

c)OA=10CM

AC=OA•2=20CM

OD=1supra 5 +AO

OD=1 supra 5+10 CM

5 OD=15 CM

OD=3CM

BD =OD•2. =6CM

AC+BD=20CM+6CM=26CM

d)CD=8CM

P AOB=23 CM

DC=8CM=>DO+OC=23CM-8CM=15CM=>AC+BD=15 CM•2=30CM