He was drawing a figure using a set square.

Triangulum is one of the beautiful constellations shining in the autumn night sky.

He yelled at me, looking at me with fury.

Please throw the leftover food in the triangular sink basket in the kitchen.

In linear algebra, triangular matrices play a very important role.

There is a complex love triangle between them.

He is good at solving trigonometry problems.

He is good at solving problems of trigonometric functions.

He trains his deltoid muscles at the gym every day.

It's difficult to solve this formula.