This skill teaches how to classify triangles based on their side lengths into three categories: equilateral (all sides equal), isosceles (two sides equal), and scalene (all sides different), using mnemonic aids for easier recall.
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Naming triangles by sides
Test your understanding of naming triangles by sides by practicing it! Work through the below exercises to use it in practice.
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Name these triangles by their side lengths.
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A triangle with all sides the same length is called an equilateral. Think equal and lateral, or side.
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A triangle with two sides the same is called an isosceles. Since it starts with 'I' and you have two eyes, that might be a good way to remember it.
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If all sides are different, it's called a scalene triangle. The last two letters are 'N' 'E', or not equal.