Squares and Triangles

What is the difference between a square and a triangle?

A square is a tool with two straight edges at a 90-degree angle, used for checking and marking right angles and as a straightedge. A triangular square, such as a speed square or set square, is a right-angled triangular tool that incorporates a 90-degree angle but also features markings and scales for a variety of other angles, making it more versatile for marking and cutting.