(a+b+c)/3=23,17
a+b+c=69,51
(a+b)/2=28,54
a+b=57,08
c=69,51-57,08
c=12,43
P=4l=4*2,4=9,6
Pdreptunghi= 9,6/2= 4,8
l=1/4 *L
P=2l+2L
P=2*L/4+2L=4,8
L/2 +2L=4,8 aducem la acelasi numitor
L+4L=9,6
5L=9,6
L=1,92
l=1,92/4
l=0,48
1,2(3)= 1 intreg 23-2/90= 1 intreg= 21/90= 1 intreg 7/30= 37/30