Also, all equilateral triangles are also classified as isosceles since they have 3 congruent sides and angles. Isosceles triangles can further be categorized as acute, obtuse, and right. Generally, triangles are categorized as acute, obtuse, right, isosceles, scalene, and equilateral. There are a few different types of isosceles triangles. The altitude drawn from the vertex angle to the base divides an isosceles triangle into two congruent right triangles.
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