Protractor (for student) Manufacturer,Supplier and Exporter in India
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Product Code : SCL-ELE-11044
This
semi-circular protractor is designed for high-frequency classroom use,
facilitating the construction and measurement of Angles
and arcs with professional-grade clarity.
|
Feature |
Engineering Specification |
|
Geometry |
Semi-circular (180°) |
|
Material |
High-Transparency, Non-Toxic
Optical Polymer |
|
Dimensions |
150mm Diameter (75mm Radius);
1mm Thickness |
|
Angular Graduations |
Dual-Scale (Clockwise and
Counter-Clockwise) from 0° to 180° |
|
Linear Graduations |
0 – 100 mm (Metric Scale) |
|
Vertex Engineering |
Integrated center-hole for
string-based angle verification |
|
Flatness Tolerance |
Precision-molded to be
horizontally level (zero warping) |
|
Packaging |
Individual protective plastic
case |
The
Science of Geometric Measurement
A
Protractor is a foundational instrument in Geometry
and Trigonometry. Our design incorporates a dual-scale system (inner and
outer scales) to allow students to measure angles from both the left and right
baselines, a critical feature for reducing procedural errors in mathematical
modeling.
According
to research found on Google Scholar, the use of
high-transparency manipulatives in STEM education improves a student's ability
to overlay tools onto complex diagrams without obscuring the underlying data.
Our protractors feature a dedicated vertex hole, allowing for the use of
"plumb lines" or fine strings to measure large-scale angles on
chalkboards or paper, a technique often used in introductory Physics
and vector analysis.
Factory-Direct
Manufacturing Excellence
By sourcing directly
from our facility, educational institutions avoid the quality inconsistencies
often found in mass-market retail supplies:
·
Optical Clarity: We utilize premium-grade resins to ensure a smooth,
scratch-resistant surface that remains clear over years of use, preventing eye
strain during detailed measurements.
·
Chemical Safety: Our products are certified free from BPA, phthalates,
and other toxic additives, meeting international safety standards for
educational materials.
·
Permanent Etching: Graduations are applied using high-contrast, permanent
marking technology that resists fading from skin oils or cleaning agents.
·
Anti-Warping Technology: Our factory employs specialized cooling cycles during
the injection molding process to ensure every protractor remains perfectly
flat, providing a reliable straight-edge for linear measurement.
Curricular
Application
This instrument is
optimized for:
1.
Angle Construction: Drawing precise acute, obtuse, and reflex angles.
2.
Arc Measurement: Assisting in Circle
geometry and chord calculations.
3.
Drafting: Serving as a compact 100mm ruler and angle guide for
technical sketching.
