Q.What would they form by meeting together?
A.By meeting together they would form an angle.

Q.What kind of an angle?
A.An acute angle?
Q.Would they form an angle at the other end?
A.
No; they would go further from each other.

Q.What is this?
A.A perpendicular line.

Q.What does perpendicular mean?
A.A line up straight, like the stem of some trees.

Q.If you look, you will see that one end of the line comes on the middle of another line; what does it form?
A.The one which we now see forms two right angles.