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Continue to ChatQuery : How to draw the perpendiculars from the incentre in Inkscape? I have a triangle ABC. I know how to draw and find the incentre O (Extensions → Render → Draw from triangle → Incentre). https://vmapp.org/query/63447/How-To-Draw-The-Perpendiculars-From-The-Incentre-In-Inkscape-I-Have-A-Triangle-ABC-I-Know-How-To-Draw-And-Find-The-Incentre-O-Extensions-Render-Draw-From-Triangle-Incentre/