Hello, I want to create a pentagon where its edges are 3 cm in length. Unfortunately, it seems like the Polygon Tool does not provide an obvious way to specify the length of its edges. I couldn't find any mention of it in the manual or tutorial either, unless I missed it somewhere. Is there a way to do this or a workaround for it? Thank you in advance.

Details:

• Inkscape version: AppImage 1.3.2 (091e20e, 2023-11-25)
• Operating system: Debian Unstable

I'd use a helper object let it be a 3cm line or 3x3cm square and let the pentagon's bottom snap to it - delete helper afterwards.

Thanks for the answer! I thought I couldn't do that since the object would move around when being resized, apparently I just need to keep resizing and snapping until the length is correct. I ended up with doing it manually: creating the lines, rotating them to form a pentagon, and joining the nodes together.

Use the polygon tool. With your pentagon still selected after drawing it, open the XML-editor.

Change the value of sodipodi:r1 to 25.52 and hit enter. (I'm assuming your document is default mm)

https://www.omnicalculator.com/math/pentagon
 

Maybe this:

For even-sided polygons, A horizontal guide can be added.

This extension does exactly what you want: https://inkscape.org/~inklinea/★polygon-side

Thanks again for the answers! The extension you mentioned is very useful.

I'm late to the party, but here's how I do it.