Circle
Circumference of a Circle
How to find out the circumference of a circle Let’s draw a regular polygon (inscribed polygon and circumscribed polygon) surrounding a circle. The perimeter of an inscribed polygon is less than the perimeter of the circle, … more
Area of Circle
How to calculate the area of a circle If you cut the circles and stick them together, they gradually become more rectangular. In this rectangle, the width is half of the circumference, and the height is … more