Pythagoras was a student of:

State whether the following statement is True or False. Justify your answer.
The edges of a surface are curves.

How many dimensions does a solid have?

The things which are double of the same thing are

State whether the following statement is True or False. Justify your answer.
Euclidean geometry is valid only for curved surfaces.

State whether the following statement is True or False. Justify your answer.
"For every line $l$ and for every point $P$ not lying on a given line $l$,there exists a unique line $m$ passing through $P$ and parallel to $l$." This is known as Playfair's axiom.