'Lines are parallel if they do not intersect' is stated in the form of

Given two distinct points,there is a ......... line that passes through them.

State whether the following statement is True or False. Justify your answer.
If the area of a triangle equals the area of a rectangle and the area of the rectangle equals that of a square,then the area of the triangle also equals the area of the square.

The edges of a surface are ............

Solve the following question using appropriate Euclid's axiom:
In the figure:
$BM = BN$,$M$ is the mid-point of $AB$ and $N$ is the mid-point of $BC$. Show that $AB = BC$.

The total number of propositions in the Elements are: