This is a prototype of JavaSketchpad, a World-Wide-Web component of The Geometer's Sketchpad. Copyright ©1990-1997 by Key Curriculum Press, Inc. All rights reserved. Portions of this work are being funded by the National Science Foundation (awards DMI 9561674 & 9623018).
This slide rule shows 2 + 3 = 5.
The top ruler measures 2 units; the bottom ruler measures an additional 3 units,
for a total distance of 5 units.