#### 📐 **2. 2D Interactive CAD Plot & Irregular Shape Calculator** • Calculate regular and complex irregular multi-sided plots with pinpoint accuracy: - **Rectangles, Squares & Parallelograms** - **Triangles & Triangulation (Heron's Formula)** - **4-Sided Irregular Quadrilaterals** - **Trapezoids, L-Shapes, Pentagons, Hexagons & Custom Polygons** • Dynamic CAD canvas to drag vertices and preview plot shapes live.