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Geometry Tutorial: Triangles, Congruency & Types

Discusses the properties and types of triangles, explaining that a triangle is a closed figure with three sides and angles. It categorizes triangles into equilateral, isosceles, scalene, obtuse, right ...
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This math problem about fractions and a pink triangle is stumping the internet — see if you can solve it

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BBC

Types of triangle

A triangle is a polygon. It is a closed 3-sided shape made up of straight lines. The ‘tri-’ part of the word triangle means three. A triangle has 3 sides and 3 angles. Interior angles are the angles ...
La Brújula Verde

Two mathematical theorems bear Napoleon’s name. Was he also a genius of geometry?

Napoleon Bonaparte, First Consul. Work by Ingres. It was during this period that he came into contact with the theorems. Credit: Public domain / Wikimedia Commons His political stance allowed him to ...