Midpoint Leyden (updated)
Where is the midpoint between East and West? Plot a point at your guess. Use the midpoint tool to see how close your guess was to the midpoint.
What other points are equidistant from East and West?
Circle Theorem 4
Silly Rooster Tessellation Step 7
DynamicCoordinates() Demo: stick to extrema
ClothesLine Math_2Step Equations
Post shadow, Sun behind
Perp Bis Problem
Post shadow, lamp in front