Each is called God. Each is credited with creation. Each claims the works of God. Yet there is only one God. For example- in the area of salvation, it is correct to say that God the Son took on human flesh and died on the cross, not God the Holy Spirit, nor God the Father.
Space has three distinct characteristics- length, height and width.
Church councils only met when important issues were in question and to make a formal resolution on them based on already existing or implicit universal beliefs. A breif look at the early church's documents, decrees and canons from this meeting will determine this adequately. The council met to discuss this matter and make a final, official resolution on the issue so that the whole church would be unified.