Hey Jasmine thank you for posting in the Lucid community! Our sincere apologies for the delayed response on this thread - I wanted to follow up in case this answer may still be useful to you and to provide a solution for other users who see this thread in the future.

You can't draw a quarter circle in Lucidchart but you can import an image SVG or VSS file of this shape by following the steps outlined in this help center article. Hope this helps!