Sounds about right, I'm always reminded of this gif that explains why and how to calculate the circumference of a circle : https://kaiserscience.files.wordpress

Sounds about right, I'm always reminded of this gif that explains why and how to calculate the circumference of a circle : https://kaiserscience.files.wordpress.com/2015/09/when-radius-is-1-called-unit-circle-then-circumference-is-2cf80.gif https://kaiserscience.files.wordpress.com/2015/09/when-radiu... and suddenly a cryptic formula from maths class is made clear through the visual display of a wheel turning.