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Do all right triangles have two or more congruent angles? - Quora
File:Isosceles triangle made of right triangles.svg - Wikipedia
A close-up of the scalene triangle.
三角剖分 - OI Wiki
What kind of triangle has two equal angles? - Quora
File:Isosceles-right-triangle.svg - Wikipedia
File:Isosceles right triangle.svg - Wikipedia
What is the name for two sides of a triangle that meet at a right angle and are parallel to one another and equal in length? - Quora
File:Isosceles skinny triangle.svg - Wikipedia
Tetrahedral symmetry
Right triangle - Wikiwand
Properties of Equilateral Triangles
File:Triangle-45-45-90.svg - Wikibooks, open books for an open world
