Parallel lines with a transversal and one given value, find the value of the other seven angles. There are many geometric terms about angles and lines to know the meaning of and understand their relationship to each other. Understanding...

What's so special about quadrilaterals? There are five special types, yes, five. Can you name them? The instructor in this video diagrams and illustrates the special types of quadrilaterals and explains what makes each one special.

There are two parallel lines intersected by one straight line, what's that one line called? A transversal. There are a few more things to know about transversal lines and the angles they create. What are vertical angles? Are they...

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...

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...

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.

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...

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...

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]

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]

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]

Proof by contradiction that if two lines cut by a transversal create congruent corresponding angles then the lines are parallel. [5:18]

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]

The video tutorial investigates parallel lines. Students learn about the mathematics concept by watching a detailed example. [3:03]

The video tutorial investigates parallel lines. Students learn about the mathematics concept by watching a detailed example. [2:42]

The video tutorial investigates parallel lines.

The video tutorial investigates parallel lines. Students learn about the mathematics concept by watching a detailed example. [3:48]

The video tutorial investigates 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]

This tutorial introduces transversals and shows what happens when a transversal meets two parallel lines. [6 :22]

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.

This video lesson demonstrates how to determine if linear equations are parallel, identical, or intersecting. Students can check their understanding with an assessment.

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.

This video demonstrates how to determine if lines are parallel given the equations.