Răspuns :
fie y - BC AB= 2y y=AD ( dreptunghi)
y= 210
AB = 2 X 210 = 420
P = 2( AD + AB )
P= 2( 210 + 420 )
P = 2x 630
P = 1260
y= 210
AB = 2 X 210 = 420
P = 2( AD + AB )
P= 2( 210 + 420 )
P = 2x 630
P = 1260