n.

a three-sided polygon

同義詞：trigontrilateral

something approximating the shape of a triangle

"the coastline of Chile and Argentina and Brazil forms two legs of a triangle"

a small northern constellation near Perseus between Andromeda and Aries

同義詞：Triangulum

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

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

Triangles and crystals: On the geometry of qualitative research
Spectral methods on triangles and other domains
Points and triangles in the plane and halving planes in space
Gaussian quadrature formulas for triangles
Diabolical Points in the Spectra of Triangles
Smooth subdivision surfaces based on triangles
Dysprosium triangles showing single-molecule magnet behavior of thermally excited spin states.
Planar graphs without 4-cycles and close triangles are (2, 0, 0)-colorable
Pink triangles: antecedents and consequences of perceived workplace discrimination against gay and lesbian employees.
Plos biology: Algorithmic self-assembly of dna sierpinski triangles