'Angles' in the Bible

The altar was made of wood, and was three cubits high and two cubits long; it had angles, and its base and sides were of wood; and he said to me, This is the table which is before the Lord.

You are to take some of its blood and put it on the four horns and on the four angles of the shelf and on the edge all round: and you are to make it clean and free from sin.

And the priest is to take some of the blood of the sin-offering and put it on the uprights at the sides of the doors of the house, and on the four angles of the shelf of the altar, and on the sides of the doorway of the inner square.

And he took me out into the outer square and made me go by the four angles of the square; and I saw that in every angle of the open square there was a space shut in.

In the four angles there were spaces walled in, forty cubits long and thirty wide; the four were of the same size.