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Visual Proof for A^3-B^3  | Visualizing Formulas
How to lie using visual proofs
Visual Proof A^3+B^3
Trig Double Angle Formulas from Semicircle (visual proof)
(a + b)^3 a plus b cube - Algebra identity - Geometrical explanation and Derivation
3D Sum of Triangular Numbers (visual proof without words III)
Triangular Numbers Modulo 3 (visual proof)
Geometric sum of powers of 1/3 (v. III visual proof in a hexagon)
Geometric series: sums of powers of 3 (visual proof)
Sum of odd integers: a generalization (visual proof)
Three Geometric Series in an Equilateral Triangle (visual proof without words)
Alternating Geometric Series: Powers of -1/3 (visual proof)