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Triangle illustration.svg
A triangle
Edges an vertices 3
Schläfli seembol {3} (for equilateral)
Aurie various methods
Internal angle (degrees) 60° (for equilateral)

In geometry, a triangle is the flet set generate bi connectin three pynts, that isna collinear, wi straucht-line segments. It is a three-sidit polygon.

The internal angles o a triangle eiks up tae 180 degrees.

The'r three kynds o triangle: aquilateral, whaur aa three sides is aqual; isoceles, whaur twa sides is aqual juist; an scalene, whaur nane o the sides is aqual tae onie o the ithers.