Răspuns:
I.1. P=4*L
L=32:4=8cm
2. P=4*L
L=24:4=6cm
3.P=2*L+2*l
46=2*15+2*l
2*l=46-30
l=16:2=8cm
II.3. OAD=180°-(60°+60°)=180-120=60°
III. triunghiul AOD echilateral
AD=AO=OD=4cm
AO=OB=OC=OD=4cm (diagonalele sunt congruente si se injumatatesc)
AC=BD=2*4=8cm
AC+BD=8+8=16cm
