Transparent sheet of plastics film - can be folded to form cubes, pyramids etc. for teaching geometry

摘要

The sheet of transparent plastics film of 140 mm x 190 mm and a thickness of 0.5 mm is used for teaching elementary geometry to young school children. The sheet has holes (1-35) of 2 mm dia. arranged in a defined pattern so that by drawing straight lines between certain holes geometrical shapes such as triangles, squares, rectangules, parallelograms, etc., can be formed. In addition, by drawing other similar lines and then folding the sheet along these lines, solid shapes, such as cubes, pyramids, prisms etc. can be formed. USE - Teaching of geometry.