From the centre to the edge is the radius, from the edge to the edge all the way across is the diameter. It's simples. Look you do this, I gotta go out. Five pizza. Remember. Good boy. VO ...

A chord separates the circumference of a circle ... Remember the circumference of a circle = \(\pi d\) and the diameter = \(2 \times \text{radius}\). The arc length is \(\frac{1}{ ...