The three steps from solids to points are:

Solve the following question using an appropriate Euclid's axiom:
In the figure,we have $AC = DC$ and $CB = CE$. Show that $AB = DE$.

Which of the following statements are true and which are false? Give reasons for your answers.
$(i)$ Only one line can pass through a single point.
$(ii)$ There are an infinite number of lines which pass through two distinct points.
$(iii)$ $A$ terminated line can be produced indefinitely on both the sides.
$(iv)$ If two circles are equal,then their radii are equal.
$(v)$ In the figure,if $AB = PQ$ and $PQ = XY,$ then $AB = XY$.

How would you rewrite Euclid's fifth postulate so that it would be easier to understand?

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

Give a definition for perpendicular lines. Are there other terms that need to be defined first? What are they,and how might you define them?