How can I geo search by non-axis box? about redis HOT 2 OPEN

With Redis Stack, you can use FT.SEARCH for such geographical queries: find all points within a specified polygon. See https://redis.io/docs/latest/develop/interact/search-and-query/query/geo-spatial/, https://github.com/redis-developer/redis-polygon-search-trains-demo, https://www.youtube.com/watch?v=CegTSglMUks

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Thanks!
At the end I have an envelope which is axis-aligned, it is defined by x1,x2,y1,y2.
I understand that I can use GEOSEARCH with the BYBOX option(which seems to be more efficient), but it seems to require converting the envelope's width and height from degrees to kilometers.
Can I directly provide the minimum and maximum latitude and longitude values to GEOSEARCH BYBOX instead of having to calculate distances in kilometers? I believe that Redis internally needs the latitude/longitude definition of the rectangle to perform the search, so I'm not sure why this functionality isn't exposed in the command.

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