9. what are two other ways to name the plane c?
10. name three collinear points.
11. name four coplanar points.
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Other names for plane C can be plane EFG or plane EBF since planes can be named using three points that lie on the plane. The three collinear points or the three points that lie on the same line are points E,B, and F which lie on line n. And, the four coplanar points or the points that lie on the same plane are points B,E,F, and G.