A website by Leon Dudhill
Drag any vertex to reshape
Triangle selected Drag any vertex to change the shape
Drag vertices to reshape · Edit angles & side lengths in the right panel · Buttons show number of sides
Shape Properties
All values update live
Measurements
Perimeter -
Area -
Interior angle sum -
Exterior angle sum 360
Shape type -
Angles
Side Lengths (units)
Interior sum = (n-2) x 180 · Exterior = 360 - interior · Interior + Exterior = 360