
Concept explainers
To draw: a sketch showing four coplanar points such that three, but not four of them are collinear.

Answer to Problem 11WE
Explanation of Solution
Concept Used:
Coplanar points are those points which lie on the same plane.
Collinear points are those points which lie on the same line.
Consider the diagram given below:
Here, the point A, B, C and D all lie on the same plane implying that these points are coplanar.
Also, the point A, B and C lie on the same line implying they are collinear. But the point D does not lie on that line so it is not collinear with the points A, B and C .
Chapter 1 Solutions
McDougal Littell Jurgensen Geometry: Student Edition Geometry
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