Prove that there is only one triple point.

Prove that if a set has only one clement then it has 2 subsets.

Show that the following triple of points are collinear : (2, 4), (0, 1), (4, 7).

Prove that, through three given points which are not collinear, there is only one circle.

Show that every line segment has one and only one middle point.

True/false There is only one point whose distance form x-axis is 4 units that from y-axis is 5 units.

A point C lies between two points A and B such that AC = BC, then AC=1/2AB . Point C is called a midpoint of line segment AB. Prove that every line segment has one and only one midpoint.

Prove that through a given point, we can draw only perpendicular to a given line.