Math Geometry Kit Sets - Suitable for most stages of students, teachers, designers, artists, etc. Meet your most needs for drawing circles and measuring angles. - Rich 10pcs Geometry School Math Set as a gift for students to start maths learning and drawing. - 2 Drawing Compasses of different types suit your needs; with box of refill, protractor, set squares, eraser, and so on. - Convenient and organized to carry in the transparent box. Go back to school and study geometry in the new semester. Straightedge/Triangle Ruler Set: Made of plastic, digital clear, help fast accurate measurement. A Triangle ruler can not only measure, but also draw an ellipse in the middle. Suitable for students, teachers, engineers, designers, artists , and so on. How to use geometry compasses? Open the drawing compass to the radius desired for your circle. Place the compass point on a piece of paper where you would like the center point of the circle to be. Place the point of the pencil/lead on the paper. Rotate the compass to mark a circle on the paper with the pencil. Draw without lifting the point of the compass of the paper. Compass Note: In the process of drawing a circle with a needle end (that is, the center) can not be moved. You can not change the distance between your feet (that is, the radius) when drawing a circle. Be careful of needles in your hands when drawing. Read more The compass set includes: 1 x Plastic box 2 x Metal Graphic Compass 2 x Triangle Rulers (45° & 30°/60°) 1 x 15cm /6"Straight Ruler 1 x180 Degree Protractor 1 x 8cm Pencil 1 x Refill 1 x Eraser 1 x Pencil Sharpener Math Geometry Kit Sets The drawing compass used to repeatedly measure or draw circles can precisely adjust the radius of the compass, and will not slide or slip out of your control at will. Made of metal material, comfortable to grip, easy drawing, and effortless. The scale is clear, the measurement is convenient, and the pattern will not fall off easily. There is a shatterproof storage box in the suit, which is convenient for storage and carrying; small size, lightweight, can be easily put in the bag. A Ten-piece compass set, suitable for many occasions, easily meets the basic needs of the painting, drawing, measurement, etc. Read more Tips: In the process of drawing a circle with a needle end (that is, the center) can not be moved. You can not change the distance between your feet (that is, the radius) when drawing a circle. Be careful of needles in your hands when drawing. Any rulers in our 10-piece round gauge set are not marked with inches, only centimeter scales. Please make sure you read this reminder before purchasing to prevent any inconvenience to you. Tips: In the process of drawing a circle with a needle end (that is, the center) can not be moved. You can not change the distance between your feet (that is, the radius) when drawing a circle. Be careful of needles in your hands when drawing. Blue Orange (function(f) {var _np=(window.P._namespace("AplusModule"));if(_np.guardFatal){_np.guardFatal(f)(_np);}else{f(_np);}}(function(P) { // register javascript with unique module id P.when("jQuery", "AplusModules-module-6", "ready").execute(function($, hoverModule) { hoverModule("aplus-module-6-4"); }); }));