A lower triangular matrix is a matrix where all the elements below the main diagonal are zero.

There is a complex love triangle between them.

Please calculate the area of this right-angled triangle.

Let's calculate the area of this right-angled triangle.

Please calculate the area of this right triangle.

He drew an equilateral triangle shape.

Please don't forget that.

The number of nuclear-armed countries is increasing worldwide.

Each class conducts lessons in their respective classrooms.

The center of that table is sunken.