Synonyms and Antonyms for triangle

1. triangle (n.)

a three-sided polygon

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2. triangle (n.)

a percussion instrument consisting of a metal bar bent in the shape of an open triangle

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3. triangle (n.)

something approximating the shape of a triangle

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4. triangle (n.)

any of various triangular drafting instruments used to draw straight lines at specified angles

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drafting instrument

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5. Triangle (n.)

a small northern constellation near Perseus between Andromeda and Aries

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Triangulum