trilateral

1. A three-sided polygon (synset 113901977)
   is a type of: polygon, polygonal shape - a closed plane figure bounded by straight sides
   subtypes:

   • acute triangle, acute-angled triangle - a triangle whose interior angles are all acute
   • equiangular triangle, equilateral triangle - a three-sided regular polygon
   • isosceles triangle - a triangle with two equal sides
   • oblique triangle - a triangle that contains no right angle
   • obtuse triangle, obtuse-angled triangle - a triangle that contains an obtuse interior angle
   • right triangle, right-angled triangle - a triangle with one right angle
   • scalene triangle - a triangle with no two sides of equal length
   • cuneus, wedge, wedge shape - any shape that is triangular in cross section
   same as: triangle, trigon

1. Involving three parties (synset 301952784)
   "trilateral talks"
   similar to: mutual, reciprocal - concerning each of two or more persons or things; especially given or done in return
2. Having three sides (synset 300241439)
   "a trilateral figure"
   similar to: many-sided, multilateral - having many parts or sides
   same as: three-sided, triangular

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