How To: Calculate the area of a circle with visuals

Calculate the area of a circle with visuals

Learn how to find the area of circle by activity method.

Requirements: A circle cut out, a pair of scissors, sketch pen, and a ruler.

Take a circle of the radius.
Fold the circle along itself.
Fold it again.
Fold yet again.
And again.
Now unfold and observe the crease.
Number all the parts circle 1, 2,3,4,5...
Cut each part of the circle.
Arrange the cutouts adjust like parallelogram.
Take the extreme part and cut into two equal parts.
And place the each of the two parts on either part on either side to get a rectangle.
Now the parallelogram transforms into rectangle.
Measure the length and breadth of the rectangle.
Now we see that the length of the rectangle is equal to the half of the circumference of the circle and the breadth is equal to the radius of the circle.

Calculate the area of the rectangle (using the formula)
Area of the rectangle= length*breadth
So the area of circle= Area of rectangle

= length*breadth

= (pi*r)*r

Which is the formula of the area of the circle?

Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.

Buy Now (97% off) >

Other worthwhile deals to check out:

Join the Next Reality AR Community

Get the latest in AR — delivered straight to your inbox.

Be the First to Comment

Share Your Thoughts

  • Hot
  • Latest