Chapter 3: Q5 (page 89)
Plane X is parallel to plane Y. If plane Z intersects X in line l and Y in line n, then l is parallel to n.
Short Answer
The blank should be filled with always.
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Chapter 3: Q5 (page 89)
Plane X is parallel to plane Y. If plane Z intersects X in line l and Y in line n, then l is parallel to n.
The blank should be filled with always.
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Name two coplanar segments that do not intersect and yet are not parallel.

Draw several diagrams to help you decide whether each statement is true or false. If it is false, show a counterexample. It is true, draw and label a diagram you could use in a proof. List, in terms of the diagram, what is given and what is to be proved. Do not write a proof.
If two triangles have equal perimeters, then they have congruent sides.
Given: bisects
Prove:

Complete each statement with the word always, sometimes, or never. A line in the plane of the ceiling and a line in the plane of the floor are parallel.
Find the value of x.

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