Chapter 1: Q19 (page 7)
The plane that contains the top of the box can be called plane ABCD.
Name the intersection of planes ABFE and BCGF.

Short Answer
The line that formed with the intersection of planes is represented by .
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Chapter 1: Q19 (page 7)
The plane that contains the top of the box can be called plane ABCD.
Name the intersection of planes ABFE and BCGF.

The line that formed with the intersection of planes is represented by .
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Find the value of the variable.
Can a given point be in two lines? In ten lines?
A plane can be named by three or more non-collinear points it contains. In chapter 12 you will study pyramids like the one shown at the right below.

Name three lines that intersect at point R.
For the following figure, state whether the figure appears to be congruent or not.

For the following figure, state whether the figure appears to be congruent or not.

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