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In Euclidean geometry, a triangle is defined by three non-collinear points connected by straight lines, forming three sides. If two lines within a triangle were parallel, they would never intersect, which contradicts the definition of a triangle that requires all three sides to connect at vertices. Therefore, two parallel lines cannot exist within a triangle, as they would not form a closed shape.

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1mo ago

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Two sides of a triangle are parallel?

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