Draw a circle with radius 5cm.
Draw square outside the circle that just encloses the circle.
Draw a square inside the circle so that its vertices lie on the circle.

a) How can you use the areas of the two squares to estimate the area of the circle?

b) Check your estimate in part a by calculating the area of the circle.

c) Repeat the activity for circles with different radii.
Record your results.

Show your work.