Questions about drawing a sphere

SketchUp
, , , ,
1

Hi everybody.

I’ve seen a couple of ways of drawing a sphere.

This is one.

try

But I also watched here another way drawing two perpendicular circles same size, but when I try I get a inner face and some edges no smooth neither soft. I can soft and smooth the edges after the process.

https://sketchucation.com/forums/viewtopic.php?f=81&t=39391#p348130

I can fix this problem if I draw the second circle smaller than the first one (it can also be bigger but then there will be a small circle inside).

a) Wouldn’t it better drawing the second circle smaller and then deleting the first one?
a) I’m doing something wrong?
b) is it possible to delete the inner face without hidden temporaly other faces?

try

Thank you.