: a triangle in which all three sides are the same length
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But constructing our perfectly symmetric equilateral triangle—a regular polygon—required some elegant legwork.—Jack Murtagh, Scientific American, 12 Sep. 2024 This equilateral triangle connects three brilliant stars — Arcturus in Boötes, Spica in Virgo and Denebola in Leo, all of them fixtures of the spring night sky in the Northern Hemisphere.—Jamie Carter, Forbes, 17 Mar. 2025 This large, nearly equilateral triangle is composed of three of the brightest stars in the sky, each belonging to its own constellation.—Joe Rao, Space.com, 17 Feb. 2025 These three bright stars form an equilateral triangle that's visible throughout the season.—Jason Fields, Newsweek, 5 Dec. 2024 In a nutshell, there’s a perfect equilateral triangle formed by the centers of the time dial, the sub-seconds dial and the big date aperture.—Allen Farmelo, Robb Report, 18 Oct. 2024 Primary colors are red, blue, and yellow, and are arranged in an equilateral triangle on the circular wheel.—Kate Reggev, Architectural Digest, 8 Oct. 2024 First draw an equilateral triangle — what the mathematicians call a seed.—Quanta Magazine, 20 Sep. 2024 First, draw an equilateral triangle, then add three circles of equal radius around each corner.—Max Springer, Scientific American, 7 Aug. 2024
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