Here is fairly basic video that takes three equations, each written in slope-intercept form, with the goal of determining whether the lines are parallel.  Sal graphs each of the equations on the same coordinate plane to show how their...

Providing an exploration of parallel lines, this resource requires students to not only practice calculations, but also to analyze angles. By asking viewers to decide whether two lines are parallel based upon the information given, this...

Can you tell, algebraically, if three lines are parallel? In this video, Sal demonstrates how to rewrite linear equations in slope-intercept form and compare the slope of each line.

Providing an exploration of parallel lines, this resource requires students to not only practice calculations, but also to analyze angles. By asking viewers to decide whether two lines are parallel based upon the information given, this...

Word problems on the SAT can be some of the trickier questions. In this practice session from page 743 in The Official SAT Study Guide, Sal demonstrates how to read word problems as algebraic expressions, writing the necessary equation...

Test-takers who have a hard time transitioning between math skills will find this video very helpful, as Sal moves quickly through increasingly complicated algebra and geometry problems. Not only are his math techniques top-notch, but...

Using The Official SAT Study Guide, Sal begins another review session of eighteen problems, six of which are addressed in this video. The problems involve variables in linear equations, angles and parallel lines, and ratios. One problem...

The final video of the SAT practice series takes students through increasingly complicated algebra and geometry problems, but Sal works steadily through each mathematical process. At the end of the video he tells students that they are...

For this simultaneous equations worksheet, students solve and complete 7 various types of problems. First, they solve graphically the system of equations shown. Then, students find the number of solutions that each pairs of equations...

Get jamming with lines and sing along to this karaoke that reviews the main types of lines. Your learners can't forget the main properties of lines when they sing the chorus on the karaoke song after the included slide show. The slides...

As a preparation for something called the angle game, a geometry video covers the concept of parallel lines, transversals, slope, opposite angles and corresponding angles. It is the third part of a series detailing the rules and laws...

So you have a transversal line intersecting two parallel lines and you are looking for a value that would make two corresponding angles congruent. You have all the information needed to write an equation to find the value. So write that...

There are many types of parallelograms, each having specific properties. A trapezoid is a special type of quadrilateral in that it has one pair, and only one pair, of parallel lines. Take a look at some of the other quadrilaterals and...

This one activity requires young geometers to pull together information they are currently learning with things they have learned previously. Here they rely on understanding something about parallel lines, alternative interior angles,...

So you have a transversal line intersecting two parallel lines and you are looking for a value that would make two corresponding angles congruent. You have all the information needed to write an equation to find the value. So write that...

Combine math and art by getting your class create a painting with parallel and perpendicular lines. Youngsters design a picture using multiple lines in a variety of thickness and color. They find parallel and perpendicular lines in real...

Fifth graders demonstrate different types of lines using movement. In this line and movement instructional activity, 5th graders demonstrate parallel and perpendicular lines, and lines of symmetry using dance movement. They also...

Who knew there were so many fun educational opportunities featuring pasta? Scholars read a brief informational text about the history of pasta (note that "macaroni" is spelled two different ways, so address this if kids are reading...

Explore algebra I/algebra II with this series of worksheets. Pupils write linear equations in slope-intercept and standard form, graph linear equations, and apply linear equations to real world applications. The six-page worksheet...

Geometers identify and determine angle pair relationships when two parallel lines are intersected by a transversal. They review the concepts of angles by watching streaming video clips online, read definitions of lines and angles from...

Middle schoolers identify the correspondence between pairs of angles. They fill in the blank for seven questions. Learners investigate congruency using their graphing calculator and by following detailed directions. They identify...

Upper graders and middle schoolers use a diagram to give examples vertical angles, alternate interior angles, and alternate exterior angles, find the degree measure of multiple angles, and draw and label a pair of complementary vertical...

Geometers explore parallel lines.  In this lesson, they examine the measures of the angles form when parallel lines are cut by a transversal.  The dynamic nature of the Cabri Jr. allows students to discover the relationships between the...

Learners draw and label 8 geometric figures when given the labels. Definitions of basic geometric figures are given. Some of the questions deal with parallel lines, perpendicular lines, and the vertex of angles and rays.