Ключевые слова: angle, background, blank, chart, circle, circular, concentric, concept, coordinate, degree, design, diagram, draft, draw, drawing, education, empty, engineer, engineering, geometric, geometrical, geometry, graph, graphic, grid, illustration, increment, line, math, mathematics, measure, measurement, paper, plan, polar graph, polar grid, print, protractor, ring, scale, school, science, sheet, sketch, step, structure, technical, template, texture,