 Proofs of the Pythagorean theorem,
a selection of answers from the Dr. Math archives.
 The Pythagorean Theorem  Dr. Math FAQ
 What is the Pythagorean theorem? When would I use it?
 From the archives:
 How Many Proofs of the
Pythagorean Theorem?
 Do you know the exact number of proofs of the Pythagorean
Theorem in existence?
 The Pythagorean Theorem
 Could you please explain the Pythagorean Theorem?
 Pythagorean Proof Based on the
Principles of Scaling
 I've decided to do a project with some connections to the
Pythagorean theorem, but the project requires innovative ideas.
 First Math Teacher, Pythagorean
Theorem
 Who was the first math teacher? How did Pythagoreas come up with
a^2 + b^2 = c^2?
 Proving the Pythagorean Theorem:
A Traditional and a Modern Approach
 Can you please explain how I can prove the Pythagorean theorem?
 Garfield's Pythagorean Theorem Proof
 Which President of the United States wrote a proof of the Pythagorean
Theorem? On what did he base his proof?
 Pythagorean Theorem Proof
(Thabit ibn Qurra)
 Proving a series of congruent triangles.
 Pythagorean Theorem Proof by
Brodie Explained
 Could you give me a stepbystep explanation of Dr. Scott Brodie's
proof of the Pythagorean theorem given at the CuttheKnot website?
 Pythagorean Theorem  Euclid's Proof
 A detailed explanation of a specific proof.
 Pythagorean Theorem Proof:
Four Right Triangles
 I don't understand the Pythagorean Theorem.
 Proving the Pythagorean Theorem
using Congruent Squares
 A friend of mine is irked because of constant use of the Pythagorean
theorem, which he has not seen proven.
 The Pythagorean Theorem:
A Modern Proof
 I know that the Pythagorean Theorem works and I can show how it
works, but why does it work?
 Proof of Pythagorean Theorem: Pythagoras' Reasoning
 I would like to know how Pythagoras reasoned his theorem.
 Pythagorean Theorem and nonRight
Triangles
 Why doesn't the Pythagorean theorem work for triangles other than
right triangles?
 Derivations of Heron's Formula
 How is Heron's formula (Hero's formula) derived?
