The shaded region of the given figure shows a plane: Name three colinear points.

Given, < We know that, If three or more points lie on the same straight line, then the points are called colinear points. The given figure shows three colinear points A, B, C as these points lies on the same line. Hence, The name of three colinear points is A, B and C.

The shaded region of the given figure shows a plane: Name three non-colinear points.

Given, We know that, If three or more points do not lie on the same straight line, then they are said to be non-collinear points. Example: The above figure shows three non-colinear points P, Q, R as these points does not lie on the same line. No lines passes through all three non-collinear points. Hence, the name of three non-colinear points is A, D and C.

The shaded region of the given figure shows a plane: Name a pair of intersecting lines.

Given, When two or more lines cross each other in a plane, they are called intersecting lines. The intersecting lines share a common point, which exists on all the intersecting lines, and is called the point of intersection. The above figure shows two lines AB and CD are intersected at point O. By observing the given figure, Two lines AC and DE are intersected at point C. Hence, the name a pair of intersecting lines is AC and DE.