# Thales's Theorem

Published on February 19, 2019
97

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Thales’s Theorem on wikipedia: https://en.wikipedia.org/wiki/Thales%27s_theorem

Thales’s Theorem is a special case of the inscribed angle theorem: https://en.wikipedia.org/wiki/Inscribed_angle

“axiom” vs “postulate” vs “theorem”: https://math.stackexchange.com/questions/7717/difference-between-axioms-theorems-postulates-corollaries-and-hypotheses

The axioms of Euclidean plane geometry: http://www.math.brown.edu/~banchoff/Beyond3d/chapter9/section01.html

sum of internal angles in a triangle:

https://www.cut-the-knot.org/triangle/pythpar/AnglesInTriangle.shtml
https://en.wikibooks.org/wiki/Trigonometry/Proof:_Angles_sum_to_180
https://en.wikipedia.org/wiki/Sum_of_angles_of_a_triangle
https://complete-concrete-concise.com/mathematics/proving-that-the-angles-in-a-triangle-sum-up-to-180/

parallel theorems: https://mathbitsnotebook.com/Geometry/ParallelPerp/PPverify.html

more circle theorems: https://www.mathsisfun.com/geometry/circle-theorems.html

angles opposite equal sides in a triangle are equal: https://gradestack.com/CBSE-Class-9th-Complete/Triangles/Angles-Opposite-to-Equal/14901-2953-3986-study-wtw

***CREDITS***

Hosted by
Michael Stevens

Edited by
Hannah Canetti
instagram: @hannaynaycanaynay

VFX by
Eric Langlay