Curated OER
How Do You Write an Equation of a Line in Slope-Intercept Form If You Have One Point and a Parallel Line?
This may seem like a complicated problem, finding an equation that is parallel to the given equation and passing through a given point, and writing it in slope-intercept form, but it's really not. It's just a matter of rearranging...
Curated OER
What Are Parallel Lines?
What kind of lines have equal slopes, equal incline or decline, and equal rise over run? Yes! Parallel lines. What are parallel lines? They are lines on a graph that go on and on and on forever and never touch each other. Watch this...
Virtual Nerd
What is the Triangle Sum Theorem?
If you add the value of the three interior angles in a triangle will it equal 180 degrees? Yes it will. The instructor illustrates and proves the Triangle Sum Theorem. Follow closely as she explains her proof.
Sophia Learning
Sophia: Graph of Solutions to Simultaneous Equations
This website provides a tutorial video for students to learn how to determine the number of solutions a system of equation has by examining the graph of the system. After reviewing the video tutorial students can then attempt practice...
Sophia Learning
Sophia: Graph of Solutions to Simultaneous Equations
This website provides a tutorial video for students to learn how to determine the number of solutions a system of equation has by examining the graph of the system. After reviewing the video tutorial students can then attempt practice...
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: 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: Geometry: Corresponding Angle Equivalence Implies Parallel Lines
Proof by contradiction that if two lines cut by a transversal create congruent corresponding angles then the lines are parallel. [5:18]
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: 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.
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 Is a Transversal?
This tutorial introduces transversals and shows what happens when a transversal meets two parallel lines. [6 :22]
Sophia Learning
Sophia: Consecutive Interior Angles Converse
This video tutorial describes and provides an example for proving two lines are parallel with the converse of consecutive-interior angles theorem. Students can check their understanding with an assessment.
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.
Khan Academy
Khan Academy: More Analytic Geometry: Parallel Lines 3
This video demonstrates how to determine if lines are parallel given the equations.
Sophia Learning
Sophia: Writing a Linear Equation From a Parallel Line and Point
Students learn how to write a linear equation from a parallel line and a point. The tutorial consists of a detailed example that explores the mathematics concept. [3:56]
Khan Academy
Khan Academy: Parallel and Perpendicular Lines
Demonstrates how to identify parallel and perpendicular lines in geometric drawings. [3:34]
Khan Academy
Khan Academy: Geometry: Identifying Parallel and Perpendicular Lines
Identifying parallel and perpendicular lines in a diagram. [3:34]