Math
Equal-area dissection
Drag piece 2 onto its target on the right. Both pieces can be moved in the scene or in the exact top view. A₁ + A₂ = b·h, b = 2. Bevels and flight height are decorative. Overlap, unfilled target and outside area are calculated from the exact polygons; equal total area alone does not prove coverage.
Try this
Move pieces with the left mouse button. Right-drag rotates the scene; the wheel zooms. The step button reveals the cut, shows the flight, then the completed rectangle. Pause freezes the animation.
Equations used in the module
Equations A₁+A₂ = b·h
