Geometry

The planes are A.plane D and D.plane plane HLK.

1. Recall the rules for naming a plane:

A plane can be named by a single capital letter (usually written in a cursive or bold font) that is not used to label a point on the plane. In the given figure, the plane is labeled with the cursive letter , so “plane ” is a correct name for the plane.

A plane can also be named by three non - collinear points that lie on the plane.

For “plane ”: Points , , and are collinear (they lie on the same straight line ), so we cannot use these three points to name the plane.

For “plane ”: Point is just a point on the plane. We cannot name a plane by a single point on the plane, so “plane ” is an incorrect name.

For “plane

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