$A$ surface is that which has $\ldots \ldots \ldots$ only.

In ancient India,$\ldots \ldots \ldots$ altars were used for household rituals.

If a straight line falling on two straight lines makes the interior angles on the same side of it,whose sum is $120^{\circ}$,then the two straight lines,if produced indefinitely,meet on the side on which the sum of angles is

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

State whether the following statement is True or False and justify your answer:
Euclid's fourth axiom states that things which coincide with one another are equal to one another.

The $\ldots \ldots \ldots$ was an important manual for geometric structures in ancient India.