Measuring Instruments Set for School Maths Lab

Quick Answer: A Measuring Instruments Set is a group of maths measuring and drawing tools, of the kind that includes a rule, protractor, set squares and compasses, used to measure lengths and angles and to construct figures. Geometry lessons use the measuring instruments set for accurate measurement and ruler-and-compass construction.

The Right Tool for Each Measurement

Each instrument answers a different question. A rule measures and draws straight lengths; a protractor measures and draws angles; set squares give fixed angles of 90°, 45°, 30° and 60° and slide along a rule to draw parallel lines; compasses draw circles and arcs and transfer equal lengths. A lesson that starts from measurement tasks shows students which tool fits which job, instead of reaching for the ruler every time.

Construction is where the instruments work together. To construct a triangle with sides of 6 cm, 5 cm and 4 cm, students draw one side with the rule, set the compasses to each of the other lengths and swing arcs from each end; where the arcs cross is the third vertex. Bisecting an angle, drawing the perpendicular bisector of a segment and constructing 60° without a protractor all follow the same pattern of arcs and straight lines, and the protractor then checks the result.

Sets of this kind are made both in student size and in large sizes for demonstration on a board, where a teacher draws constructions the whole class can follow. The instruments included, their size and whether the set is meant for board or desk use should be confirmed before ordering.

Applications

• Measuring lengths and angles accurately and recording them with units
• Constructing triangles from given sides and angles
• Bisecting angles and line segments and drawing perpendiculars
• Drawing parallel lines by sliding a set square along a rule
• Checking constructions by measuring with the protractor

Care & Handling

• Store the measuring instruments set with each tool in its own place so edges and points are not damaged against each other.
• Keep compass points protected when stored, and teach students to carry compasses point down.
• Never use the edge of a rule or set square as a guide for a cutting blade; nicks make drawn lines uneven.

Specifications

Why Choose LabEquip

Geometry teachers need matching instruments for construction lessons, whether for board demonstration or for students’ own practice. LabEquip lists this set in its Mathematics School Lab Products range with related items such as the Geometrical Stencils for tracing shapes; confirm the pieces and sizes through the LabEquip contact page.

Frequently Asked Questions

Which instrument should be used for which task?

Use the rule for straight lengths, the protractor for measuring or drawing angles, set squares for right angles, fixed angles and parallel lines, and compasses for circles, arcs and copying lengths. Choosing the right tool is part of what students learn.

How is a triangle constructed from three sides?

Draw the longest side with the rule. Set the compasses to the second length and draw an arc from one end, then set them to the third length and draw an arc from the other end. Join the point where the arcs cross to both ends of the base.

How do set squares draw parallel lines?

Place one edge of the set square along the line and hold a rule firmly against another edge. Slide the set square along the rule and draw along the first edge again. Every line drawn this way is parallel to the original.

Why construct an angle of 60 degrees with compasses?

Arcs drawn from each end of a line with the compasses kept at the same radius meet at the vertex of an equilateral triangle, so the angle formed is exactly 60°. It shows that constructions rely on geometric properties, not on reading a scale.

How should a protractor be read?

Place the centre point on the vertex and line up the zero line with one arm of the angle. Read from the scale that starts at zero on that arm; using the wrong scale gives the supplement, such as 130° instead of 50°.

Are compasses safe for younger students?

With rules, yes: carry them point down, store them with the point protected and never use them away from the desk. Students should hold compasses by the top knob while drawing so the point stays in place.

Last Updated: September 2026