Question

draw any circle on a graph sheet count the squares and use them to estimate the area of the circular region​

Answer 1

Estimating area of the circle using graph:

• Draw a circle of radius 3 cm on a graph sheet.
• Count the number of full squares inside the circle.
• Number of full squares = 16
• Count the number of squares with more than half area.
• Number of such squares = 8
• Count the number of half squares.
• Number of half squares = 8
• Now, area of circle

                      =  16 + 8 + (8/2)

                      = 24 + 4

                      = 28 $cm^{2}$

Finding area using formula:

                       r = 3 cm

                    Area = $\pi r^{2}$

                             = (22/7)(9)

                             = (3.14)(9)

                             = 28.26 $cm^{2}$

Answer 2

Answer:

1. draw a radius = 3cm
2. number of square =16
3. half no. of square = 8
4. half no. of square = 8
5. area of circle=
6. 16+8+8/2
7. 16+12
8. 28 cm square