circumference of a circle, 2r, how to get the formula
55 views - 19 Jan 2011
a quick explanation on why the circumference of a circle is 2r. buy my app! https://itunes.apple.com/us/app/euclids-elements-book-1/id717831746?ls=1&mt=8 ...
55 views - 19 Jan 2011
a quick explanation on why the circumference of a circle is 2r. buy my app! https://itunes.apple.com/us/app/euclids-elements-book-1/id717831746?ls=1&mt=8 ...