10 circular pieces of paper each of radius 1 cm have been cut out from a piece of paper having a shape of an equilateral triangle. What should be the minimum area of the equilateral triangle?
The circular pieces of paper aligned in rows, like
configure the skeleton of an equilateral triangle.
The external equilateral triangle must have a minimum side length of
So each side must have a length of
After cutting out 10 circular pieces the triangular paper will have structure as shown below