complete quadrilateral

noun

: a figure that is determined by four coplanar lines, and has four sides and three diagonal axes, each two of which cut the other harmonically in three centers of which one or even two may be at infinity

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“Complete quadrilateral.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/complete%20quadrilateral. Accessed 23 Nov. 2024.

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