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Protractor STARPAK 180° / 10 cm, model 283231
STARPAK 180° protractor model 283231 is a transparent, semicircular measuring instrument with a 10 cm diameter designed for drawing and measuring angles up to 180 degrees. Made to support school lessons, drafting and hobby activities, the protractor provides clear graduations that allow accurate reading and easy alignment with rulers or straightedges. Its compact size and see-through material make it practical for notebooks, geometry exercises and quick angle checks in craft or technical sketches.
The transparent construction ensures unobstructed view of the underlying drawing so graduations and reference lines remain visible when aligning the protractor. Clear, evenly spaced degree markings up to 180° facilitate precise measurements and transfers of angles. The 10 cm diameter balances portability and readability: large enough for classroom work yet compact for storage in pencil cases. The simple semicircular shape is compatible with standard rulers and set squares, supporting consistent layout and measurement routines.
Place the protractor so that its flat edge aligns with the baseline of the angle and the center mark sits on the vertex. Read the degree measurement where the second side of the angle crosses the numbered scale. For drawing an angle, mark the desired degree on the scale and draw a line from the vertex through that mark. Use the transparency to align with existing construction lines and combine with a ruler for extended measurements.
Handle the protractor on flat, clean surfaces to maintain accurate readings. Avoid bending or exposing it to high temperatures to prevent deformation of the plastic. Combine with a straight ruler or set square for improved alignment and repeatable results in schoolwork and technical sketches.
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