Chapter 1: Q20 (page 7)
The plane that contains the top of the box can be called plane ABCD.
Name two planes that do not intersect.

Short Answer
The planes ABFE and DCGH are the required planes.
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Chapter 1: Q20 (page 7)
The plane that contains the top of the box can be called plane ABCD.
Name two planes that do not intersect.

The planes ABFE and DCGH are the required planes.
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State the following statement is true or not.
If , then point B must be the midpoint of .
Point X is equidistant from F and T. Furthermore, point Y is equidistant from F and T. Does that mean that X and Y are equally distant from F?

Name a fourth point that is in the same plane as the given points.
E, F, H

Sketch and label the figures described. Use dashes for hidden parts.
Three vertical planes intersect in a line.
Find the value of the variable.
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