Question

if two lines intersect then they intersect in exactly one point
Is that true or false

Answer 1

The first one is a postulate. Postulates are assumed to be true.
For the theorem, can you figure out how to use the postulate to prove that it is true?

Answer 2

true, because they're perpindicular.

Answer 3

Postulate: Through any two points, there is exactly one line.
2
Theorem: If two distinct planes intersect, then they intersect in exactly one line.
or this one

Answer 4

The answer is true! As shown in my photo.

Answer 5

true