三角 (sankaku) means “triangle” | MotiTan Japanese Dictionary

More examples

この形は三角です。ko no katachi wa san kaku de su

This shape is a triangle.

折り紙を三角に折ってから、中央に線を描きます。o ri gami o san kaku ni o tte ka ra chū ō ni sen o ega ki ma su

I fold the origami paper into a triangle and then draw a line down the middle.

It refers to a shape formed by three straight sides that meet at three corners.

三角形sankakukei: A geometric figure with three straight sides and three corners.

三つの辺と三つの角を持つ平面図形。mit tsu no hen to mit tsu no kado o mo tsu hei men zu kei

三角 (sankaku) is a Sino-Japanese compound of 三 (san, "three") and 角 (kaku, "corner" or "angle"), naming a shape with three corners.

In English, triangle can describe a three-way connection among people, groups, or places, not only a shape.