Function ellipseA

ellipseA(a: number, b: number): number
Calculates the area of an ellipse.
Parameters
- a: number
  The major axis length
- b: number
  The minor axis length
Returns number
Example
```
// Returns 94.2477796076938
const area = Chalkboard.geom.ellipseA(5, 6);
```
- Defined in Chalkboard.geom.ts:169