one
In Euclidean planar geometry, not unless they're collinear, in which case they intersect an infinite number of times. In other types of geometry ... maybe.
It depends on how many lines intersect. An infinite amount.
From 8 non-collinear points, the number of straight lines that can be drawn is determined by choosing any two points to form a line. This can be calculated using the combination formula ( \binom{n}{r} ), where ( n ) is the total number of points and ( r ) is the number of points to choose. For 8 points, the calculation is ( \binom{8}{2} = \frac{8 \times 7}{2 \times 1} = 28 ). Therefore, 28 straight lines can be drawn using 8 non-collinear points.
50. It is always two times the rotation.
Two non-parallel lines intersect at exactly one point. This is because non-parallel lines, by definition, will eventually cross each other unless they are coincident (which means they lie on top of each other). In the case of non-parallel lines, they will always meet at a single unique point in a two-dimensional plane.
An example of a famous parallelism is "It was the best of times, it was the worst of times."
parallel lines never intersect.
Coplanar lines can intersect an infinite amount of times.
In Euclidean planar geometry, not unless they're collinear, in which case they intersect an infinite number of times. In other types of geometry ... maybe.
Two straight lines can cross either once or never.
It depends on how many lines intersect. An infinite amount.
It depends on how many lines intersect. An infinite amount.
Two.
4
1
If it's a line it would only be 1, but if it's a parabola, or something with a curve, it could be multiple times.
Draw a straight line segment. From one of its ends, draw another straight line segment. From the end of this straight line, draw another straight line segment which does not touch any of the existing lines. Repeat the same 5 more times. From the end of this last line, draw a straight line to the start of the first line. You may need to tweak some of the intermediate lines so that the last line does not intersect an existing line. That is it! A plane area enclosed by 9 straight lines = a 9-sided polygon.