Circle
- Tags
- math
A geometric shape with the property that every point on the shape is equidistant to its center.
Area on the surface of a face is \[ A = \pi r^2 \]
Circumference (length along the rim) is \[ 2 \pi r \]
The general equation of a circle with radius \( r \) and centre \( (a,b) \) is
\begin{align} (x - a)^2 + (y - b)^2 = r^2 \label{eq:circ-general} \end{align}