Create 2D shape from skeleton lines

Say I have the following sketch:

How do I expand each line to a specified thickness and merge them such that I end up with a single closed surface?

Clipper offset tool followed by boundary surface?

I’m trying to use base GH components, but you pointed me in the right direction with the suggestion to use an offset. My solution is to just use Offset Curve followed by Region Union. Thank you!

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