147۰994907 ÷ 2 =73۰99745385. 148۰0140971 ÷ 2 =74۰00704854. The radius of the circle is 74 cm to the nearest cm. Practise pi and working out the circumference of circles with this quiz.

Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = ...

The circumference of a circle = \(\pi d\) or \(2\pi r\). Look at the sector of the circle shown below. To calculate the length of the arc, we need to know what fraction of the circle is shown.

Pi is the number you get when you divide a circle's circumference by its diameter ... What will the future of computing look like? Getty Images The symbol for pi is also the 16th letter in ...