Geometry 4.2a, Classifying triangles by angle or side

An explanation of how to classify triangles by their angle measure as acute triangles, equiangular triangles, right triangles, or obtuse triangles. How to classify triangles by their side lengths as equilateral triangles, isosceles triangles, or scalene triangles. Using triangle classification to find side lengths of a triangle that are given as algebraic expressions with a variable x, how some classifications can hurt together, and solving a problem that consists of finding the sides of a triangle to determine the number of musical triangles that can be manufactured.

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