Place a scale (ruler) on a sheet of paper and hold it firmly with one hand. Now draw two line segments AB and CD along the longer edges of the scale. State whether segment AB is parallel to or perpendicular to segment CD.
Mark two points A and B on a page of your exercise book. Mark a third point P, such that: P does not lie between A and B yet the three points are collinear.
Mark two points A and B on a page of your exercise book. Mark a third point P, such that: P lies between A and B ; and the three points A, P and B are collinear.
Under what condition will two straight lines, in the same plane, have: an infinite number of points in common. If possible draw a diagram in support of your answer.