Ключевые слова: 90, angle, architect, calibration, cartography, centimeter, chart, circle, circular, clipart, cm, construction, dial, distance, drafting, engineer, equipment, exact, face, geometric, gradation, green, isolated, length, line, mark, math, measure, metric, millimeter, mm, number, one, plastic, protractor, realistic, round, ruler, scale, school, sewing, size, stick, straight, tool, top, transparent, true, white,