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, and the perimeter of … 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 the radius. Therefore, The … more