R and θ in classical notation with your numbers substituted， and the equilibrium status . When Fx and Fy are both (near) zero the status turns green and the force polygon closes. The Live equations panel shows ΣFx， press Apply Polygon Law to play an animation: each force slides into place tip-to-tail one after another while the original arrows fade to grey， ΣFy， the component sums Fx and Fy ， then the white resultant is drawn closing the polygon. The grey/animated result stays on screen until you make a change it is the clearest way to see why the resultant is the closing side of the force polygon. (The button needs at least two forces.) 。

Every force is drawn as a coloured arrow from the point. The readout badges show the resultant magnitude ， its direction ， and Show Calculations opens a full step-by-step derivation (resolve sum magnitude direction). The Equilibrant toggle shows the single force that would balance the system equal in magnitude and opposite in direction to the resultant. The Components toggle shows the resultant resolved into its rectangular Rx and Ry parts. The Display panel adds Angle arcs a traditional arc drawn from the +x axis round to each force， labelled with its angle in degrees plus switches for Labels ， Axes and Grid so you can declutter the diagram when teaching or taking a screenshot. With the Polygon layer on，。