Question

Determine the area of the given circle if the area of a square grid is 2 sq.cm ?

Answer 1

In order to find the area we have to count the number of squares fully filled, more than half filled and less than half filled.


Number of squares fully filled = 1 (marked as green)
Number of squares more than half filled = 4 (numbered from 1 to 4)
Number of squares less than half filled = 4 (Remaining squares)

Area = Number of squares fully filled x Area of a square grid + Number of squares more than half filled x Area of a square grid +Number of squares less than filled x 0
= 1 x 2 + 4 x 2 + 4 x 0
= 10 sq.cm