A Protractor, Triangle Ruler, and Open Book Clipart Image http://www.iclipart.com/search.php?keys=189077&id=198 Surfdoggie's Review: Clipart image of a protractor, triangle ruler and an open book. This color clipart picture shows a group of supplies for school, including a protractor, a triangle ruler, and an open textbook. It is a full-color clipart illustration, on a white background. Please visit the link above to find out how you may use these images. You may need to pay for use of the images or abide by certain licensing restrictions. academics, book, books, education, geometry, learn, learning, math, mathematics, measure, measurement, measurements, measuring, open book, open books, protractor, protractors, ruler, rulers, school, school supplies, school supply, schools, study, studying, text book, text books, textbook, textbooks, tool, tools, triangle ruler, triangle rulers, type of ruler, types of rulers