Header Banner
WonderHowTo Logo
WonderHowTo
Math
wonderhowto.mark.png
Gadget Hacks Next Reality Food Hacks Null Byte The Secret Yumiverse Invisiverse Macgyverisms Mind Hacks Mad Science Lock Picking Driverless
Home
Math

How to Calculate the area of a circle with visuals

The circle is transformed into a parallelogram.

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?

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

Related Articles

Comments

No Comments Exist

Be the first, drop a comment!