– π (pi) is a mathematical constant, approximately equal to 3.14159 If we know the circumference of a circle, we can easily find out its radius by rearranging this formula and solving for ‘r’: r = C / ...

In geometry, the circle is a fundamental shape that holds immense importance. Central to a circle’s properties is its radius – the distance from its center to any point on the circumference. Knowing ...

The circumference of a circle is the distance around the shape. The ability to round a number to a number of decimal places or to a number of significant figures means that answers can be written to ...

Pi represents the ratio of the circumference of a circle to its diameter. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Pi is a number that ...

The chapter on “Circles” forms an important part of Mathematics. This chapter includes many interesting and useful formulae. One such formula is the circumference of the circle. Students must know and ...

The radius of a circle or a sphere is the distance between the center and the edge. The radius can be used to calculate a circle's diameter, area and circumference. Likewise, a sphere's volume is ...