By far the most popular and well-stocked category of used instruments is our selection of guitars, where we've got a huge variety of all the big names. Used Gibson Les Paul, pre-owned Fender Telecaster and secondhand Stratocaster guitars are commonly found within these pages, waiting for their new homes with players and collectors.
22/7 is a pretty decent choice for teaching 11-year-olds about fractions that are close to pi. 355/113 would be better, if you think they can remember numbers that big. And approxRational is fun. Exercise for the interested reader: implement an inverse to approxRational.
Not sure if you know this but there's this device called a âcalculator.â The cool thing about it is that it can calculate square roots very easily. So if we plug in pi and set the calculator to find the square root of pi, we get 1.7724538509. So pi is approximately 1.7725.