triangle; triangular shape
Refers to the geometric shape or anything triangular in form.
この図形は三角です。
This figure is a triangle.
三角の旗が風に揺れている。
A triangular flag is fluttering in the wind.
I cut the sandwich into triangles.
It's a house with a distinctive triangular roof.
I ended up in a love triangle with my friend and her boyfriend.
triangular prism
triangular-rimmed mirror with deity and animal motifs