How it works ?
This GeoGebra applet dynamically illustrates one interesting fact Archimedes discovered as he was using triangles in his attempt to calculate the area of a parabolic segment (i.e. area bounded by a parabola and any secant line drawn through it) by method of exhaustion.
LARGE POINTS are MOVEABLE at any time.
The unlabeled slider (upper right) adjusts the parabola’s vertical stretch.
Segments and/or lines of same style-type (color, style) that appear parallel ARE PARALLEL.