Polygon
It is a plane figure, for example, a semicircle, a triangle, a kite.
A vertex is the shared endpoint of two or more line segments.
is the definition of a polygon.
Yes. Parallel Lines are also two coplanar lines that do not intersect.
No
Things in the same plane are coplanar.
Yes, of course, two line segments can be coplanar: Think of the sides of a plane triangle.
A polygon, but only if all the line segments are coplanar.
True
Polygon
A set of points, lines, line segments, rays or any other geometrical shapes that lie on the same plane are said to be Coplanar.
A set of points, lines, line segments, rays or any other geometrical shapes that lie on the same plane are said to be Coplanar.
a polygon.
It is a plane figure, for example, a semicircle, a triangle, a kite.
No. A trinagle does not require four points, three are sufficient. And any three points, if they are not colinear, must be coplanar.
IF (and only if) the lines are al coplanar, then a polygon.