12 Pcs Plastic Protractor 180 Degree, Angle Measurement Ruler Set

Product description Designed for math learning and engineering drawing, this 12-piece semicircular protractor set is made of transparent engineering plastics for excellent anti-fall and wear resistance. Each protractor has a 10 cm (4 inch) ruler at the bottom, and the 180-degree standard semicircle shape is combined with clear double-scale annotations to ensure accurate measurements. The reasonable height of 5.5 cm is matched with smooth edges, which is smooth and smooth when used without scraping paper. The light and thin arc design is easy to store in textbooks or pencil bags. Whether it is student classroom geometry exercises, teacher teaching demonstrations, or simple engineering drawings, this set of protractors can provide reliable measurement support. The special material characteristics make it difficult to deform for a long time and always keep the scale clear. It is a practical tool for STEM education and work learning.