Geometricpack with lots of available calculations for 2D and 3D geometry
The geometry-engine package provides comprehensive geometric entities, mathematical operations, and transformations for 2D and 3D space. This package mimics AutoCAD ObjectARX's AcGe (Geometry) classes and provides the mathematical foundation for CAD opera
A free package of geometric and trigonometric formulas if you need help with any math equation.
"A Node.js package for geometric calculations related to rectangles and squares, including area, perimeter, and diagonal calculations. Ideal for applications requiring mathematical operations on these shapes."
This package contains the geometric formulas for calculating area.