Large Triangular Ruler & Angle Protractor – Math Teaching Tool

Professional Large Triangular Ruler & Angle Protractor Set

Take your math and geometry lessons to the next level with this Professional Large Triangular Ruler & Angle Protractor. Designed for teachers, architects, engineers, artists, and students alike, this multifunction measuring tool makes geometry drawing, angle measurement, and classroom demonstrations clear, precise, and effortless.

Key Features

• Large, Clear Scale Markings: Bold, easy-to-read numbers are perfectly sized for use at a blackboard, whiteboard, or dry-erase board — no squinting required from the back of the classroom.
• Detachable Grip Handle: The hollow center design pairs with a removable handle for a comfortable, secure hold during demonstrations and drawing sessions.
• Durable ABS Plastic: Wear-resistant and dimensionally stable — this ruler won't warp, bend, or scratch hands, even with daily use.
• Smooth, Burr-Free Edges: Precision-molded corners and edges ensure accurate lines every time while keeping hands safe.
• Multifunction Design: Functions as a triangular ruler, angle protractor, and geometry drawing aid — a versatile all-in-one tool for school and office.
• Multiple Size Options: Available in a range of sizes (see listing variants) to suit different classroom and workspace needs.

Who Is This For?

Whether you're a math teacher drawing angles on the board, an architect sketching blueprints, a designer laying out geometric shapes, or a student working through geometry homework, this ruler set delivers the accuracy and visibility you need.

Specifications

• Material: ABS Plastic
• Applicable Scenario: Teaching, drafting, design, geometry, school, office
• Weights: 01 – 261g | 02 – 261g | 03 – 197.2g | 04 – 218.3g | 05 – 173.6g
• Country of Origin: Made in China

Package Includes

• 1 × Triangular Ruler / Angle Protractor / Compass (variant dependent)

Note: 1 cm = 10 mm = 0.39 inch. Please allow 1–2 mm tolerance due to manual measurement. Colors may vary slightly from screen to screen.

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Frequently Asked Questions

Q: What types of measurements can I take with this large triangular ruler and angle protractor?

A: This multifunction teaching tool allows you to measure and draw angles, straight lines, and geometric shapes. It functions as both a triangular set square and an angle protractor, making it ideal for geometry lessons, architectural drafting, and design work in school or office settings.

Q: Is this triangular ruler suitable for use on a whiteboard or blackboard?

A: Absolutely! The large, bold scale markings are specifically designed to be clearly visible on whiteboards, blackboards, and dry-erase boards — perfect for classroom demonstrations where students need to see measurements from a distance.

Q: Is the handle removable, and how does it help during use?

A: Yes, the handle is detachable. The hollow center combined with the removable grip handle makes it easy to hold the ruler firmly while drawing straight lines or demonstrating angles, reducing hand strain during extended teaching sessions.

Q: What material is this ruler made from, and is it durable?

A: This ruler is made from high-quality ABS plastic, which is wear-resistant and highly resistant to warping or deformation. The smooth, burr-free edges are safe to handle and maintain their shape even with regular daily use.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.