No, two straight lines can intersect at only one point and that is their point of intersection.
True
In Euclidean plane geometry two infinitely long straight lines intersect at only one point
yes
Two lines are coplanar iff they are parallel OR intersect.
No, two straight lines can intersect at only one point and that is their point of intersection.
Perpendicular lines intersect at one point only.
Yes.
True
If two different lines intersect, they will always intersect at one point.
In Euclidean plane geometry two infinitely long straight lines intersect at only one point
yes
Two lines are coplanar iff they are parallel OR intersect.
Lines in a plane can intersect at only one point.
This is true. If three straight lines are drawn, they can only intersect at two points. That is, each line will only intersect with another once.
Two straight lines, whether they're in the same or different planes, must intersect at either one point or else at no points.
Yes [in the Euclidean plane].