Complete each statement with the word always, sometimes, or never.

If two parallel lines are cut by a third plane, then the lines of intersection are _______ coplanar.

Short Answer

Expert verified

The sentence is:

If two parallel lines are cut by a third plane, then the lines of intersection are always coplanar.

Step by step solution

01

Step 1. Consider the diagram.

Here, X and Y are two parallel lines.

02

Step 2. State the explanation.

From the diagram,

The two parallel lines x and y are cut by a third plane, then the lines of intersection l and n are always coplanar.

Here, the correct word is always.

03

Step 3. State the conclusion.

Therefore, the statement is:

If two parallel lines are cut by a third plane, then the lines of intersection are always coplanar.

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