Well, there are really only two: parallel and intersecting. Parallel lines go in the same direction and never cross; intersecting lines do cross (or intersect). However, a third relationship, that's actually a special case of intersecting lines, is the case of perpendicular lines. Perpendicular lines are those that make four right angles when they intersect. Really, it's enough if you know that only one of the angles is a right angle - the rest follow automatically.
A polygon is a plane figure bounded by a finite number of straight lines. To enclose an area then a minimum of three straight lines are required. All triangles, not just isosceles triangles, are polygons.
A triangle is a shape that has 3 sides and 3 corners. It is a three-sided polygon, which is a plane shape bounded by three straight lines.
Polygons are shapes that have three or more sides * * * * * There is more to a polygon. It is a closed, plane (flat) shape. The three or more sides must be straight lines.
Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise.
collinear plane
Three or more straight lines in a plane such that they intersect pairwise.
The three requirements are that it is a plane (2-dimensional) shape.It is an enclosed area. Its boundaries comprise straight lines.
An unequal triangle is a closed plane figure bounded by three straight lines such that the length of at least one of the lines is different from that of another.
A triangle is a shape that has 3 sides and 3 corners. It is a three-sided polygon, which is a plane shape bounded by three straight lines.
A polygon is a plane figure bounded by a finite number of straight lines. To enclose an area then a minimum of three straight lines are required. All triangles, not just isosceles triangles, are polygons.
A triangle is a shape that has 3 sides and 3 corners. It is a three-sided polygon, which is a plane shape bounded by three straight lines.
Polygons are shapes that have three or more sides * * * * * There is more to a polygon. It is a closed, plane (flat) shape. The three or more sides must be straight lines.
Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise.
It is a plane shape bounded by three straight lines that meet [pairwise] at three distinct vertices.
They are straight lines where two plane faces of the shape meet. The definition is sometimes extended to curved lines where curved (3d) faces meet such as at the base of a cone.
collinear plane
No. If they are parallel, then a plane exists which both lines lie in. Skew lines can not be on the same plane.