Math exam .2
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Parallel Lines
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15 Terms
What are parallel lines?
Parallel lines are lines that do not intersect.
What are perpendicular lines?
Perpendicular lines are lines that intersect and create four right angles.
What is the symbol for perpendicular lines?
The symbol is ⊥.
What does a⊥ba \perp b mean?
It means line a is perpendicular to line b.
What is a transversal?
A transversal is a line, line segment, or ray that intersects two or more lines at different points.
What are the three regions formed by two parallel lines cut by a transversal?
The regions are two exterior regions and one interior region.
What is the interior region?
The interior region is the area between the two lines.
What is the exterior region?
The exterior region is the area outside the two lines.
What does the symbol ≅ mean in the notes?
It means equal in measurement.
What are corresponding angles?
Corresponding angles are angles that occupy the same relative position when a transversal crosses parallel lines.
What are alternate interior angles?
These angles are on opposite sides of the transversal and inside the two parallel lines
What are alternate exterior angles?
These are the angles on opposite sides of the transversal and outside the parallel lines
What are same-side interior angles?
These angles are on the same side of the transversal and inside the parallel lines
What are same side exterior angles?
These angles are on the same side of the transversal and outside the parallel lines
What are vertical angles?
the opposite pairs of angles created when two straight lines cross