Lines
Two lines of a plane are said to be parallel if they do not intersect and the perpendicular distance betweem them is always same.
A plane shape. There is no specia name unless all the line segments are straight.
It is called a polygon. * * * * * Yes, but only if they are straight line segments. And, in that case, the shape is a quadrilateral.
If they are not parallel and do not intersect then they would not be in the same plane (not possible), but they would be called skew lines.
A polygon is any plane figure with a finite amount of straight line segments. Some examples of polygons without parallel sides would be a triangle, a star and a pentagon.
lines
Two lines of a plane are said to be parallel if they do not intersect and the perpendicular distance betweem them is always same.
no, if they are both in the same plane and IF EXTENDED INDEFINITELY would never intersect at any point then the segments are considered parallel.
US DefinitionA trapezoid is a closed plane figure consisting of four line segments/sides; two of these line segments are parallel (but not equal in length) and two are nonparallel.(in the UK, this is called a trapezium)British DefinitionA trapezoid is a closed plane figure consisting of four line segments/sides; NONE of these line segments are parallel to any of the other line segments of the quadrilateral.(in the US this is just a quadrilateral)*(see the related links for images of trapezoids)
It is because they are not in a plane that is parallel to the horizontal.
A plane shape. There is no specia name unless all the line segments are straight.
polygon
It is called a polygon. * * * * * Yes, but only if they are straight line segments. And, in that case, the shape is a quadrilateral.
If they are not parallel and do not intersect then they would not be in the same plane (not possible), but they would be called skew lines.
Plane waves travel parallel to each other in the same plane hence the name.
The shape described by the intersection of the cone and the plane is simply a circle.
A polygon is any plane figure with a finite amount of straight line segments. Some examples of polygons without parallel sides would be a triangle, a star and a pentagon.