Calculating area in Google Earth Engine || Part-1/3

[@toadfootns]

hi, nice tutorial, but i have a problem. First calculation of surface area of Goa that you do and get result 3685, which looks good but fast look trough wikipedia shows that area of goa is 3,702 km². Iam trying to do this metod on bigger area and then ofc i get bigger error... I do the area calculations in arcGis and get same result as wikipedia. Why is this metod giving smaller area size, and how to do it correctly?

[@maya17527]

thank you

[@GeoGuru1]

You're welcome

[@santiagomarinmarulanda6672]

Thanks my friend

[@د.أحمدسعيدياسينالغريري]

Please.. upload the code you used in the comments !!