Yes.
11mm x 11mm = 121 mm2
Yes it has an 11mm Dovetail scope mount
11mm=1.1cm
Yes, 11mm is smaller.
You mount it the same way you mount a scope. The rifle or gun must have an 11MM or Weaver mount on the barrel for the red dot to attach to.
11mm
1.1
no
As long as it has an 11mm ring mount then Yes. And I think it does, or you can order 11mm scope rings for the scope.
1.1cm
0.011 metres