Imagine a circle of diameter 1 unit, and another circle of a similar diameter,
and another. What is the total perimeter of these three circles (you can leave your answer
with
in it)?
What is the perimeter of a circle of diameter 3 units?
*****
Now imagine two circles - one of diameter 2 units and one of
diameter 3 units.
What is the total perimeter of these two circles?
What is the perimeter of a circle of diameter 5units?
***** What do you notice? Is this generally the case with combinations of circles whose total diameters are
equal? Can you explain why?