Question

Playfair's Axiom says, "Given a line and a point not on that line, there exists only one line through the given point parallel to the given line." This is the modern version of the Parallel Postulate. Why is this a postulate instead of a theorem?

It is true by definition.
Despite many people's best efforts, it can't be proven from other postulates.
It is a logically self-evident truth.
There is no geometric system in which it isn't true.

Answer 1

@dm91

Answer 2

i helped to

Answer 3

LOL

Answer 4

lol i know lol i was going to tag you too but you got here before i could

Answer 5

im to fast

Answer 6

what do you think the answer is?

Answer 7

i think A not sure why tho

Answer 8

i think B

Answer 9

yeah i would go with B as well

Answer 10

thnx guys :)

Answer 11

yep