A is of the same age as B and C is of the same age as B.Euclid's which axiom illustrates the relative ages of A and C?
(a) First axiom
(b) Second axiom
(c) Third axiom
(d) Fourth axiom
Euclid stated that 'all right angles are equal to each other',in the form of
(a) a definition
(b) an axiom
(c) a postulate
(d) a proof