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What is the length of the side of equilateral triangle?

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What is the length of the side of equilateral triangle?

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Using nested (similar) triangles to show that the tangent function is well-defined.

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Sides of a Triangle: Open Middle Problem (V2)

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Sides of a Triangle: Open Middle Problem (V2)

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Sides of a Triangle: Open Middle Problem (V1)

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Sides of a Triangle: Open Middle Problem (V1)

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Triangles with 3 Common Measures: IM 7.7.8