Lines and Angles
A line that cuts through 2 or more lines at different points
Transversal
The symbol for perpendicular
Upside down capital T
The symbol for parallel
ll
True or False: Sometimes there is not enough information to prove that lines are parallel.
True
If two lines are perpendicular to the same line, what can one conclude?
The two lines are parallel.
Two lines that are not coplanar and never intersect
Skew
If two lines are perpendicular to one another, this is the number of right angles that are created.
4
Another word for same-side interior angles
Consecutive interior angles
If the lines being cut by a transversal are going to be parallel, and one angle is 40 degrees, the corresponding angle is going to be ___.
40 degrees
If a line is parallel to a given line, and another line is parallel to that given line, the three lines have to be ____.
Parallel
The top and bottom of a box would be defined as _________________ ________________.
Parallel planes
The word used for two angles whose sum is 90 degrees.
Complementary
If two parallel lines are cut by a transversal, the corresponding angles will always and forever be _____.
Congruent
True or False : If vertical angles are congruent, the lines cut by a transversal must be parallel.
False
When the transversal is perpendicular to two parallel lines, what is the angle of the alternate exterior angles?
90 degrees
Corresponding Angles are a pair of angles that are in the _________________ __________________.
Same position
If a linear pair is made of two congruent angles, then each angle is _____.
90 degrees
The symbol for congruent
The equal sign with a squiggle on top
When looking at same-side interior angles, if the two angles add up to equal 180, what can you conclude?
The two lines are parallel
When a transversal is perpendicular to a pair of parallel lines, what will the same-side interior angles be?
Supplementary
If a pair of angles are on opposite sides of a transversal and are contained between two lines, they would be classified as ___________.
Alternate Interior Angles
Perpendicular lines have ______ point(s) of intersection.
1
Same-side exterior angles will always be ______.
Supplementary
Fix the error: If two alternate exterior angles are supplementary, then the two lines being cut by the transversal are parallel.
If two alternate exterior angles are CONGRUENT...
If a transversal cuts through a pair of parallel lines and one of the same-side interior angles is 54, what must the other angle measure?
126 degrees