△GHI has vertices at G(–9,5), H(–3,9), and I(–4,4).Is △GHI an isosceles triangle? Justify your answer.
Question
Solution 1
To determine if △GHI is an isosceles triangle, we need to check if two of its sides have the same length. We can do this by using the distance formula, which is √[(x₂ - x₁)² + (y₂ - y₁)²].
Calculate the length of GH: √[(-3 - -9)² + (9 - 5)²] = √[(6)² + (4)²] = √[36 + 16] = √52
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