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I'm looking for an online tool that will let me draw lines and circles etc on a plane and then tell me the positions of any intersections, the size of any angles formed and potentially lengths of formed arcs.

Does anyone know of one?

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  • $\begingroup$ You can try Geogebra $\endgroup$ – Blex Aug 31 '17 at 16:04
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You might be interested in GeoGebra. Is free, easy-to-use and has all features you are looking for.

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This is the best free software which is very close to your request: http://car.rene-grothmann.de/doc_en/download.html

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