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Are two lines with a transversal coplanar?
Usually, a transversal is a line that intersects two (or more) parallel lines. In that case the lines and the transversal are coplanar. However, a transversal does not have to intersect parallel lines. And in that case, the lines need not be coplanar. Here's one way to visualise the latter situation. Stand in a cuboid room. Line one = the edge joining the wall opposite you to the ceiling. Line two = the edge joining the wall on your right to the floor. Transvesal = the edge joining the opposite wall to the wall on your right. The transversal meets both the two lines but lines 1 and 2 are not coplanar.
What does the radius and diameter have in common?
They both describe a circle. The radius is the length from the middle of the circle to the edge. The diameter is the length of a straight line going through the middle of the circle edge to edge.
What is points common to the 2 sides of an angle or the two sides of a polygon?
Point common to two sides of an angle = vertex. Points common to two sides of a polygon, if they exist, are all the points along an edge.
What is the edge of a polygon?
The edge is this ___ that would be an edge on a shape
When are two lines in intersecting planes skew?
Each line can either intersect the edge which is common to the two planes at some point or be parallel to it. If the two lines intersect the edge, but at different points, then the lines are skew. If only one of the lines intersects the edge, then again the lines are skew. If neither of them intersect, then the two lines are parallel to the same edge and so they are parallel to one another so not skew.
