• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/20

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

20 Cards in this Set

  • Front
  • Back
Parallel Lines
Coplanar lines that do not intersect
Skew lines
Noncoplanar lines that are neither paralled nor intersecting
Parallel planes
Planes that do not intersect
Parallel Planes Theorem
If two parallel planes are cut by a third plan, then the lines of intersection are parallel
CA Postulate (Theorem)
If two parallel lines are cut by a transversal, then corresponding angles are congruent.
AIA Theorem
If two parallel lines are cut by a transversal, then alternate interior angles are congruent.
SSI Theorem
If two parallel lines are cut by a transversal, then same-side interior angles are supplementary.
Perpendicular Transversal Theorem
If a transversal is perpendicular to one of two parallel lines, then it is perpendicular to the other one also.
(b∥a; if c T a then c T b)
Parallel Postulate
(Converse of CA Postulate)
If two lines are cut by a transversal and correspond angles are congruent, then the lines are parallel.
Converse of AIA Theorem
If two lines are cut by a transversal and alternate interior angles are congruent, then the lines are parallel.
Converse of SSI Theorem
If two lines are cut by a transversal and same-side interior angles are supplementary, then the lines are parallel.
Converse of Perpendicular Transversal Theorem
In a plane, two lines perpendicular to the same line are parallel.
Theorem 3-8
Through a point outside a line, there is exactly one line parallel to the given line.
Theorem 3-9
Through a point outside a line, there is exactly one line perpendicular to the given line.
Parallel Theorem
Two lines parallel to a third line are parallel to each other.
Scalene triangle
None of the sides are congruent
Isosceles triangle
At least two of the sides are congruent
Equilateral triangle
All of the sides are congruent
Acute triangle
A triangle with three acute angles
AEA Theorem
If two parallel lines are cut by a transversal, then alternate exterior angles are congruent.