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Published on
January 30, 2015
Bhaskara’s Visual Proof of the Pythagorean Theorem
geometry mathematics
Behold!
Published on
January 22, 2015
Proof of the Sum of the Interior Angles of a Triangle Using Parallel Lines and Angle Properties
geometry mathematics
Let us use corresponding and alternate interior angles.
Published on
January 20, 2015
Euclid's Proof of the Pythagorean Theorem
geometry mathematics
Euclid's proof is deductive and geometrically creative!
Published on
January 19, 2015
Proof of the Pythagorean Theorem Attributed to Pythagoras
geometry mathematics
A classic rearrangement proof attributed to Pythagoras.
Published on
January 18, 2015
The Equality of Vertically Opposite Angles
geometry mathematics
Proof and historical attribution of vertically opposite angles.