Name three coplanar points on plane HGD.

The plane HGD contains at least three points
The three points on the plane are H, G and D
Coplanar points are at least three points that are in the same plane
The name of the plane is given as:
Plane = HGD
The above means that points H, G and D are on the plane HGD
Hence, the three points on the plane are H, G and D
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