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In mathematics, the Pythagorean theorem or Pythagoras' theorem is a fundamental relation in Euclidean geometry between the three sides of a right triangle.It states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides.
A Proof of the Pythagorean Theorem From Heron's Formula at cut-the-knot; Interactive applet and area calculator using Heron's Formula; J. H. Conway discussion on Heron's Formula "Heron's Formula and Brahmagupta's Generalization". MathPages.com. A Geometric Proof of Heron's Formula; An alternative proof of Heron's Formula without words ...
Using the Pythagorean theorem to compute two-dimensional Euclidean distance In mathematics , the Euclidean distance between two points in Euclidean space is the length of the line segment between them.
A primitive Pythagorean triple is one in which a, b and c are coprime (that is, they have no common divisor larger than 1). [1] For example, (3, 4, 5) is a primitive Pythagorean triple whereas (6, 8, 10) is not. Every Pythagorean triple can be scaled to a unique primitive Pythagorean triple by dividing (a, b, c) by their greatest common divisor ...
Pappus's area theorem describes the relationship between the areas of three parallelograms attached to three sides of an arbitrary triangle. The theorem, which can also be thought of as a generalization of the Pythagorean theorem , is named after the Greek mathematician Pappus of Alexandria (4th century AD), who discovered it.
The Kepler triangle is named after the German mathematician and astronomer Johannes Kepler (1571–1630), who wrote about this shape in a 1597 letter. [1] Two concepts that can be used to analyze this triangle, the Pythagorean theorem and the golden ratio, were both of interest to Kepler, as he wrote elsewhere:
The Bride's chair proof of the Pythagorean theorem, that is, the proof of the Pythagorean theorem based on the Bride's Chair diagram, is given below. The proof has been severely criticized by the German philosopher Arthur Schopenhauer as being unnecessarily complicated, with construction lines drawn here and there and a long line of deductive ...
Emil, The classical Pythagoras's theorem is in 3D. The third dimension is the rotation axis associated with the angle between the two sides. The Lagrange identity only leads to Pythagoras's theorem when in 3D. Try getting Pythagoras's theorem from a Lagrange identity in 2D and see how you get on. David Tombe 18:24, 18 May 2010 (UTC)