Khan Academy
Khan Academy: Algebra: Perpendicular Lines
This video demonstrates how to determine if lines are perpendicular given the equations. There are three equations listed but they are not all in slope-intercept form. Practice problems available. [3:29]
Khan Academy
Khan Academy: Algebra: Parallel Lines
This video demonstrates how to determine if lines are parallel given the equations. There are three equations listed and the lines that are parallel will contain the same slope. Practice problems available. [3:48]
Khan Academy
Khan Academy: Algebra: Parallel Lines 2
This video demonstrates how to determine if lines are parallel given the equations. There are three equations listed but they are not all in slope-intercept form. Practice problems available. [3:03]
Khan Academy
Khan Academy: Algebra: Perpendicular Lines 2
This video demonstrates how to find the equation of a line when given a point on the line and the equation of a line perpendicular to it. Practice problems available. [3:01]
Khan Academy
Khan Academy: Algebra: Parallel Lines 3
This video demonstrates how to determine if lines are parallel given the equations. There are three equations listed but they are not all in slope-intercept form. Practice problems available. [2:42]
Khan Academy
Khan Academy: Algebra: Parallel Line Equation
This video demonstrates how to find the equation of a line when given a point on the line and the equation of a line parallel to that line. The equation given is not in slope-intercept form. [4:24]
Khan Academy
Khan Academy: Algebra I Worked Examples: Perpendicular Lines
The learning exercise is a video that examines perpendicular lines. Students watch an example on how to determine if lines are perpendicular. [3:29]
Khan Academy
Khan Academy: Algebra I Worked Examples: Parallel Lines 2
The video tutorial investigates parallel lines. Students learn about the mathematics concept by watching a detailed example. [3:03]
Khan Academy
Khan Academy: Algebra I Worked Examples: Parallel Lines 3
The video tutorial investigates parallel lines. Students learn about the mathematics concept by watching a detailed example. [2:42]
Khan Academy
Khan Academy: More Analytic Geometry: Parallel Lines 2
The video tutorial investigates parallel lines.
Khan Academy
Khan Academy: Algebra I Worked Examples: Parallel Lines
The video tutorial investigates parallel lines. Students learn about the mathematics concept by watching a detailed example. [3:48]
Khan Academy
Khan Academy: More Analytic Geometry: Parallel Lines
The video tutorial investigates parallel lines.
Khan Academy
Khan Academy: Algebra I Worked Examples: Perpendicular Lines 2
The learning exercise is a video that examines perpendicular lines. Students watch an example on how to write the equation of a perpendicular line. [3:01]
Khan Academy
Khan Academy: More Analytic Geometry: Perpendicular Lines 2
This video demonstrates how to find the equation of a line when given a point on the line and the equation of a line perpendicular to it.
Virtual Nerd
Virtual Nerd: What Are Parallel Lines?
Lines that are parallel have a very special quality. This tutorial takes a look at parallel lines and how they are different from other types of lines. [4:06]
Virtual Nerd
Virtual Nerd: What Are Perpendicular Lines?
The angles formed by perpendicular lines will always be the same. Take a look at this tutorial to learn about perpendicular lines and see a special trick involving them. [5:22]
Virtual Nerd
Virtual Nerd: What Are Skew Lines?
This video tutorial introduces skew lines which are two lines that do not intersect and are not parallel. [3:46]
Virtual Nerd
Virtual Nerd: What Is a Transversal?
This tutorial introduces transversals and shows what happens when a transversal meets two parallel lines. [6 :22]
Sophia Learning
Sophia: Identifying Parallel, Intersecting, and Identical Lines
This video lesson demonstrates how to determine if linear equations are parallel, identical, or intersecting. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Interpreting Slope
This video lesson demonstrates how to interpret the slope of linear equations to determine if lines are parallel or perpendicular. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Perpendicular Lines
This lesson defines perpendicular lines and gives an assessment to check understanding.
Sophia Learning
Sophia: Perpendicular Lines
In this video tutorial [2:10], perpendicular lines are defined and explained in this lesson. Take a quiz to assess learning.
Sophia Learning
Sophia: Perpendicular Lines
Discover the difference between perpendicular lines and intersecting lines. Assess understanding with a quiz.
Sophia Learning
Sophia: Proving Lines Perpendicular With Adjacent Congruent Angles
If lines are perpendicular then two intersecting lines form adjacent angles. Assess learning with a quiz.