Răspunsuri

2014-04-23T10:20:45+03:00
ABCD-paralelogram, AB paralrl cu CD, AB perpend pe BD,⇒ung(ABD)=90 gr, BD=10 cm, AD=26cm, AD, BC-diagonale,
In tr ABD drept in B    AB²=AD²-BD²    ⇒AB=24 cm
P paralelogr=2AB+2BD=2*24+2*10=68cm
P-perimetrul
2 5 2