triangular

kolmiomainen, kolmio-

kolmikulmainen Shaped like a triangle.
(quote-book)
Of, or pertaining to, triangles.
Having a triangle as a base; as, a triangular prism, a triangular pyramid.
Having three elements or parties; trilateral, tripartite.
(l)
English triangular, shaped like a triangle
having a triangle as a base
having three elements or party parties
English triangular
to triangulate