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The third line is known as a transversal.

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14y ago
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Q: What is it called when two parallel lines are intersected by a third line?
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If two parallel planes are intersected by a third plane the lines of intersection are parallel.?

Yes, they are.


When two lines are both intersected by a third line the non-adjacent angles which are in the interior of the two lines and on opposite sides of the intersecting line are called?

If the intersected lines are parallel then the angles are called equal alternate angles


What does it look to have two parallel lines that are intersected by a third line perpendicular to the parallel lines?

It looks like a ladder with only one step, a railroad track with only one tie, or the upper-case letter ' H '.


What is a pair of angles formed by two lines intersected by a third line?

More info needed. Are the 2 lines parallel, perpendicular, or? are the angles that you are interested in on opposite sides of the intersecting line or the same side. The intersecting line is called a transversal. If the original lines are parallel, angles between the 2 lines on opposite sides of the transversal are called alternate interior angles, etc.


A pair of angles formed by two lines intersected by a third?

There are at least 28 different pairs of angles: 66 if the first two lines are not parallel. Your question needs to be more specific as to which angles you mean.


If two lines are parallel to a third line then the two lines are parallel?

They are parallel to each other.


What is the angles on the inner sides of two lines intersected by a third line?

Any angle that you like.


If two parallel planes are cut by a third plane the lines of intersection are?

Parallel lines.


What starts with an l and is a pair of angles formed by two lines intersected by the third line?

Possibly an isosceles triangle


What is a angle on the inner sides of two lines intersected by a third line?

Here a diagram would be great and help visualize your question. My quick though is that unless the first two lines are parallel, they must intersect at some point. With this assumption (not parallel) a triangle is formed and the inner angles a, b and c would add up to 180 degrees.


Are two lines parallel to a third line parallel to each other?

Yes.


What is the third line that intersects two parallel lines?

A transversal.