11/18/2023 0 Comments Ruler and compass drawing softwareLets see if Harry and Lloyd have discovered how to use these geometric tools properly. A second calibration for the second axis, because some screens, software and scans are distorted. ![]() ![]() A compass constructs circles and copies segments without measuring. Because I have to review CAD files and get them sometimes only as scan or image - I would like to calibrate the ruler on the screen (Hotkey and mouse wheel), to an existing dimension ( this helps especially when zooming into the drawing) 2. A protractor can be used to measure angles as well as draw angles of a specific measure. I seem to recall that the Smart Board construction interface is somewhere along these lines, but I'm looking for a sandbox that students can play with on their chromebooks or smart phones. A ruler is for measuring segments and drawing segments of a specific length. The latter would have you pick the center, draw a faint complete circle, let you choose the arc(s) of the circle you wanted, and then erase the complete circle when you were done. Both of these drawbacks keep Geogebra, IXL, and Euclidea from effectively simulating what a real-world compass-and-straightedge construction looks and feels like.ĭoes anyone know of an online tool that would do a better job? I'm imagine an interface where the compass operations would be changing the radius and making a circle. Rather, the "compass" setting on all of these tools require you to set a radius (via two points or a line segment) for each circle drawn. The second flaw is that the "rusty compass" style of setting a compass size and then drawing a number of arcs with that radius is not native to the apps. In the first activity, they draw the line using a ruler, whereas in the second one they constructed the segment with the compass. For instance, here is the traditional look of a successful angle bisection versus the same construction where full circles are drawn. The first is that they all use compasses to make circles instead of arcs. There are two main drawbacks that I can identify. ![]() My problem is that I really don't like how Geogebra and other tools (like IXL and Euclidea) manage constructions. Obviously, students need a little familiarity with holding a compass and making accurate markings without injuring themselves, but learning and practicing the steps of the necessary constructions could be more convenient with virtual tools instead of real ones. I've been particularly eager to get that working with compass-and-straightedge constructions. In this weird pandemic school year, I'm doubly interested in technology integration to help my virtual (high school) students as much as my in-person students.
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