Test your knowledge on Pi Use this quiz to help revise and test your knowledge on Pi and how to use it. GordonC published on May 13, 201414 responses 0 Questions in vertical order What is the formula to find the circumference of a circle when given the radius? 2πr πr πr2 Tick all the correct formulas for finding the circumference of the circle Select the two correct answers πd 2πd d 2πr πr πr2 π2r A dartboard has a radius of 20cm. The bullseye in the centre of the board has a radius of 1cm.Find the area of the dartboard outside of the bullseye 1252cm2. 1242.86cm2. 1252.86cm2. 1242cm2. Grace and Scarlet each have a circular pond in there garden. Grace's pond has a diameter of 6mScarlet's pond has a diameter of 3mfind the circumference of each pond. The circumference of Grace's pond is 18.84m and the circumference of Sacrlet's pond is 9.42m. The circumference of Grace's pond is 18.84m and the circumference of Sacrlet's pond is 9.50m. The circumference of Grace's pond is 18.34m and the circumference of Sacrlet's pond is 9.42m. The circumference of Grace's pond is 18.34m and the circumference of Sacrlet's pond is 9.50m. Find the volume of a cylinder that has a radius of 5 cm and a height of 11cm 345.575191895 345 325.575191895 What is the estimated numerical value of pi? 2.14 3.14 31.4 3.4 πr² is the formula to find what? The circumference of a circle the surface area of a cylinder the area of a circle the volume of a cylinder