............ is credited with giving the first known proof.

Write whether the following statement is True or False. Justify your answer.
If a quantity $B$ is a part of another quantity $A$,then $A$ can be written as the sum of $B$ and some third quantity $C$.

Write whether the following statement is True or False. Justify your answer.
"The statements that are proved are called axioms."

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.

Pythagoras was a student of:

In ancient India,the shapes of altars used for household rituals were: