Yes.
netball :P
How they are simiar are, They are about the same size.
Yes, they are similar.
Complete & Complex
If horizontal, a circle. If vertical, a semi-circle.
yes
Dahargram and Angarpota is one complete complex of Bangladesh.
They have simiar rates to other banks. So in that way I would call them comeptitive.
No fish breathe through their gills. (simiar organ to lungs yet functions differently)
yes
You have a complex sentence. Best is the last word of a complete sentence. When is an adverb. It is followed by the word They. The word They starts a complete sentence. Thus, the word when makes the second sentence subordinate to the first sentence. That makes it complex.