| Subject | English | Estonian |
| ed. | triangle of knowledge | teadmiste kolmnurk |
| comp., MS | triangle strip | kolmnurgatriip (A sequence of triangles in which adjacent triangles share an edge. The first three vertices define the first triangle, and each subsequent vertex defines a new triangle using that point along with two vertices from the previous triangle in the sequence) |
| math. | triangle test | kolmnurgatest |