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POWhat's the tool used to create geometry illustration graphics on wikipedia
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copied!<p>When I read articles about geometry/graphics on wikipedia, I see some very clean illustration graphics, for example:</p> <p><img src="https://i.stack.imgur.com/nDJFU.png" alt="enter image description here"> <img src="https://i.stack.imgur.com/yu1Q2.png" alt="enter image description here"> <img src="https://i.stack.imgur.com/wiaNM.png" alt="enter image description here"></p> <p>Is there any way to create graphics like this easily?</p> <p>[edit] I got 3 votes for close this topic when it was viewed 6 times. Ok, let me give more background here: I'm a programmer mainly for CAD tools. I need to check wikipedia when I have problems for some basic geometry calculation. So I read articles which includes some clean geometry illustration graphics.</p> <p>I know that it's easy to create graphics like this in a CAD tool. But I don't think people will spend more than US$1000 to buy a CAD tool just in order to draw graphics like this.</p> <p>Actually my favorite illustration tool is Microsoft PowerPoint. I used it a lot to help me analysis. It's really easy for me to quickly draw some illustrations like this. But today I got some issues. I want to draw 3 lines and make their length fixed, then drag the end points of them to verify my algorithm. The requirement is: when I drag the end points, the length of the 3 lines should be fixed, or in future I can adjust it accurately(I mean, with a specific number). I tried PowerPoint for a while, but cannot make it. Then I posted this question to stackoverflow, my favorite Q&A community. I also has some contributions to this community.</p> <p>Why 50% of your guys viewed this question and vote for close? </p>

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