Triangle Squaring
Let 
be the Altitude of a Triangle 
and let 
be its Midpoint. Then
and
can be squared by Rectangle Squaring. The general Polygon can be treated by drawingdiagonals, squaring the constituent triangles, and then combining the squares together using the PythagoreanTheorem.See also Pythagorean Theorem, Rectangle Squaring
References
Dunham, W. ``Hippocrates' Quadrature of the Lune.'' Ch. 1 in Journey Through Genius: The Great Theorems of Mathematics. New York: Wiley, pp. 14-15, 1990.
- Clock Solitaire
- Closed Curve
- Closed Curve Problem
- Closed Disk
- Closed Form
- Closed Graph Theorem
- Closed Interval
- Closed Set
- Close Packing
- Closure
- Clothoid
- Clove Hitch
- Clump
- Cluster
- Cluster Perimeter
- C-Matrix
- Coanalytic Set
- Coastline Paradox
- Coates-Wiles Theorem
- Coaxal Circles
- Coaxaloid System
- Coaxal System
- Cobordant Manifold
- Cobordism
- Cobordism Group