depends how you arrange them
hmm, it is 12x2 by 12x3
so that means each is 12 in diameter
the area of each=pir^2
d/2=r=12/2=6
area of each circle=pi6^2=36pi
there are 6 disks so 216pi is the area of the disks
the amount not used=rectangle-disks=36 times 24-216pi=864-216pi=185.41598682460466049206902921163
so about 185 square cm was not used
if you used 3.14 for pi, then about 186 square cm was not used
