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Set Square, Blackboard, 30-60-90 degrees
Set Square, Blackboard, 30-60-90 degrees (Product Code: SLE/CS/09) is a chalkboard triangle with a 60 cm longest side, made of 5 mm thick plastic, graduated in centimetres on all sides and fitted with a detachable handle. Teachers use it to draw 30- and 60-degree lines, right angles and equilateral-triangle constructions large enough for a whole class to follow, and its scales let it double as a board ruler. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, for schools equipping maths rooms alongside their mathematics lab kits in India and abroad.
Specifications
| Parameter | Detail |
|---|---|
| Type | Blackboard triangle / set square (chalkboard triangle) |
| Angles | 30, 60 and 90 degrees |
| Longest side | 60 cm |
| Material | Plastic, 5 mm thick |
| Graduation | Graduated in cm on all sides |
| Handle | Detachable |
| Estimated weight | 0.264 kg |
| Estimated volume | 0.869 cdm |
Typical Use
With the handle fitted, the teacher can press the triangle firmly against the board and draw along an edge without fingers getting in the way of the chalk. The 30-degree and 60-degree corners give those angles directly, two 60-degree lines from the ends of a base produce an equilateral triangle, and repeating the step around a point builds a regular hexagon. Because every side carries a centimetre scale, the same instrument measures the lengths it draws, so pupils see both the angle and the measurement at once.
Remove the handle when the lesson is over so the set square can be stored flat in a cupboard or drawer, which protects the graduated edges. Wipe away chalk dust with a dry cloth rather than a wet one to keep the scale easy to read. As a school lab equipment manufacturer in India, ScienceLab offers it together with the other board instruments so a maths classroom can be equipped in one order.
Manufacturer
The 30-60-90 blackboard set square is produced under the ScienceLab brand of Jain Scientific Equipments Private Limited, whose workshop and offices are in Ambala, Haryana. The company builds classroom teaching aids as well as science laboratory apparatus; see the ScienceLab profile for details.
Related Classroom Student Products
Pair it with these items for board geometry lessons:
- Set Square, Blackboard,45-45-90 degrees — the companion triangle for right-isosceles constructions.
- Protractor, Plastic, for Blackboard, 44cm — measures angles the set squares cannot give directly.
- Compass, Plastic, for Blackboard, 45cm — draws the arcs used in triangle and hexagon constructions.
- Chalk, White — for clear lines along the set square edge.
- Duster/Wiper for Blackboard — cleans the board and the instrument after the lesson.
Explore the Classroom Student category for more classroom items.
Frequently Asked Questions
How long is the longest side?
The longest side is 60 cm, which gives lines long enough to be seen from the back of a classroom.
What is it made of?
It is made of 5 mm thick plastic.
Does it have measuring scales?
Yes. It is graduated in centimetres on all sides, so it can be used as a ruler as well as a set square.
Why is the handle detachable?
The handle gives a firm grip while drawing; taking it off lets the set square lie flat for storage or transport.
What are the weight and packed volume?
The estimated weight is 0.264 kg and the estimated volume is 0.869 cdm, useful when planning shipments.
Can I order it with the right-isosceles blackboard set square?
Yes. Both are listed in the same category and can be quoted together through the contact page. ScienceLab supplies schools in India and international markets.
Request a Quote
For a quotation on the 30-60-90 degree blackboard set square, contact us through the contact page or add it to the enquiry cart.
Last updated: 24 September 2026
