Question

cutting a circle into equal sections of a small central angle to find the area of a circle by using the formula A=πr2

Answer 1

Isn't this one of the themes for our ICSE math project, therefore, our teacher explained it to us. Initially, they had to draw a large circle on graph paper with an unknown radius.

• Then, just like cutting the slice of pizza, we have to cut out equal portions of the circle.
• Once you've cut out the entire circle, alternatively arrange each segment next with each other in a reverse way.
• It will quote a check from each of these areas.
• Measure the length of it to get the circumference of a circle.
• Using formula $\bold{2\pi r}$, you can now estimate the radius of the circle from the circumference, with this formula $\bold{\pi r^2}$, we can quickly calculate the area of the circle from the radius.

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