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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 ...
BBC

Angles, lines and polygons - Edexcel

A scalene triangle has 3 sides of different lengths and 3 unequal angles. An isosceles triangle has 2 sides of equal length. The dashes on the lines show they are equal in length. The angles at the ...
The Conversation

A brief illustrated guide to ‘scissors congruence’ − an ancient geometric idea that’s still fueling cutting-edge mathematical research

Maxine Calle is the 2023 AAAS Mass Media Fellow at The Conversation U.S. and she receives funding from the National Science Foundation. Mona Merling receives funding from the National Science ...
Quanta Magazine

The Simple Geometry Behind Brownie Bake Offs and Equal Areas

Proving that two polygons have the same area can be as easy as cutting them up and rearranging the pieces. Gina the geometry student stayed up too late last night doing her homework while watching The ...