Khan Academy
Khan Academy: Example Involving an Isosceles Triangle and Parallel Lines
This video demonstrates how to use the triangle sum theorem, properties of isosceles triangles, and special angle pairs formed when parallel lines are cut by a transversal to set up an equation using given algebraic expressions for angle...
Khan Academy
Khan Academy: Geometry: Angles Formed Between Transversals and Parallel Lines
Explains the relationship between the measures of angles formed when parallel lines are cut by a transversal based on relationships of corresponding, vertical, and supplementary angles. [7:53]
Khan Academy
Khan Academy: Geometry: Angles (Part 3)
Identifies and defines the types of angles formed by parallel lines cut by a transversal and the relationship of their measures. Discusses Triangle Sum Theorem. [9:48]
Study Pug
Study Pug: Parallel Line Equation
This video lesson takes a look at questions related to parallel line equations. [2:03]
Art of Problem Solving
Art of Problem Solving: Angles and Parallel Lines
Video tutorial discusses the relationships among angles formed when a transversal intersects parallel lines. [5:54]
Khan Academy
Khan Academy: Parallel & Perpendicular Lines Intro
Parallel lines never intersect, and perpendicular lines intersect at a 90 degree angle. Learn how to identify parallel and perpendicular lines.
Khan Academy
Khan Academy: Parallel & Perpendicular Lines
Parallel lines are lines in a plane that are always the same distance apart. Parallel lines never intersect. Perpendicular lines are lines that intersect at a right (90 degrees) angle.
Khan Academy
Khan Academy: Drawing Parallel Line Segments
Sal draws parallel line segments with given points.
Study Pug
Study Pug: Perpendicular Line Proofs
Video lesson explains angles, lines, and transversals. [9:33]
Khan Academy
Khan Academy: Geometric Definitions Example
Watch Sal solve a problem where he matches three students definition of parallel lines to a teacher's comments.
Sophia Learning
Sophia: Corresponding Angles Converse: Lesson 6
This lesson [5:22] will demonstrate how to prove lines parallel with the converse of the corresponding angles postulate. It is 6 of 6 in the series titled "Corresponding Angles Converse."
Sophia Learning
Sophia: Corresponding Angles Converse: Lesson 1
This lesson will demonstrate how to prove lines parallel with the converse of the corresponding angles postulate. It is 1 of 6 in the series titled "Corresponding Angles Converse." [2:37]
Sophia Learning
Sophia: Slope of Parallel Lines: Lesson 4
The slope of parallel lines is discussed in this lesson. It is 4 of 5 in the series titled "Slope of Parallel Lines."
Sophia Learning
Sophia: Slope of Parallel Lines: Lesson 1
The slope of parallel lines is discussed in this lesson. It is 1 of 5 in the series titled "Slope of Parallel Lines."
Sophia Learning
Sophia: Corresponding Angles Converse: Lesson 3
This lesson [3:41] will demonstrate how to prove lines parallel with the converse of the corresponding angles postulate. It is 3 of 6 in the series titled "Corresponding Angles Converse."
Sophia Learning
Sophia: Corresponding Angles Converse: Lesson 4
This lesson [3:57] will demonstrate how to prove lines parallel with the converse of the corresponding angles postulate. It is 4 of 6 in the series titled "Corresponding Angles Converse."
Sophia Learning
Sophia: Corresponding Angles Converse: Lesson 5
This lesson [3:29] will demonstrate how to prove lines parallel with the converse of the corresponding angles postulate. It is 5 of 6 in the series titled "Corresponding Angles Converse."
Sophia Learning
Sophia: Drawing Line Relationships: Lesson 2
This lesson will demonstrate how to draw intersecting, perpendicular, and parallel lines.
Khan Academy
Khan Academy: Parallel & Perpendicular Lines Intro
Learn the properties of parallel and perpendicular lines so that you can easily identify them. [2:08]
Sophia Learning
Sophia: Consecutive Exterior Angles Converse
This video lesson demonstrates how to determine if two lines are parallel by using the converse of the consecutive-exterior angles theorem. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Consecutive Exterior Angles Converse
This video lesson demonstrates how to determine if two lines are parallel by using the converse of the consecutive-exterior angles theorem. Students can check their understanding with an assessment.
Shmoop University
Shmoop: Parallel Lines and Transversals
A video clip showing parallel lines and transversals. Using everyday items to familiarize the student with the concept.