Triangular ruler

Triangular ruler is a stationery tool made in a triangular shape, used for measuring and drawing straight lines and angles.

It is commonly used in mathematics, geometry, engineering, and technical drawing.

Key features:

Triangular-shaped ruler (set square type)
Made of plastic or transparent material
Has measurement markings in centimeters or millimeters
Includes different angles (like 30°, 45°, 60°, 90° depending on type)
Often used in pairs with other set squares

Common uses:

Drawing straight lines
Measuring and constructing angles
Geometry and mathematics work
Technical and engineering drawings
School assignments and exams