Ключевые слова: abstract, architecture, background, blank, blue, compass, copy, design, drawing, drawings, education, empty, engineer, engineering, equipment, geometry, graph, graphic, graphing, grid, instrument, life, line, lines, math, mathematics, measurement, mechanical, office, paper, pattern, pencil, plan, print, protractor, ruler, school, sheet, sketch, space, square, still, study, tool, white,