[Free Registration/Login may be required to access all resource tools.] This concept teaches students about perpendicular lines in the coordinate plane, and how to use slopes to determine whether or not two lines are perpendicular.

[Free Registration/Login may be required to access all resource tools.] Use slopes to determine if two lines are perpendicular.

[Free Registration/Login may be required to access all resource tools.] This concept teaches students about perpendicular lines.

[Free Registration/Login may be required to access all resource tools.] Identify intersecting, parallel and perpendicular lines in a plane

[Free Registration/Login may be required to access all resource tools.] Students practice identifying parallel and perpendicular lines after watching a video tutorial.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to count perpendicular lines in a drawing.

Use your knowledge about the slopes of parallel and perpendicular lines to solve some problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login Required] Students explore the concept of perpendicular lines by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about...

Given characteristics of two lines, such as slopes and equations, the student will determine whether the lines are parallel, perpendicular, or neither.

[Free Registration/Login may be required to access all resource tools.] Use perpendicular line properties and theorems.

[Free Registration/Login may be required to access all resource tools.] Identifying types of lines as parallel lines, perpendicular lines or intersecting lines.

Given points that two lines go through or the graph of each line, classify the lines as parallel, perpendicular, or neither. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...

Learners exhibit comprehension of advanced mathematics skills in Geometry. The questions check understanding on parallel and perpendicular lines.

A list of geometry definitions and a matching activity.

[Free Registration/Login may be required to access all resource tools.] Students watch two videos and attempt practice problems on how to determine if two lines are perpendicular.

This activity will help students understand the relationship between the slopes of parallel and perpendicular lines.

This activity has students discover the relationship between parallel and perpendicular lines and their slopes. After constructing these objects using CABRI Geometry II for the TI-89, slopes are measured. [Requires Adobe Reader.]

In this activity, students use the Cabri software to mark points, draw lines, construct parallel and perpendicular lines, angles, bisectors, and triangles. They learn how to use the tool to measure angles.

A complete reference guide to points, lines, and planes. It provides definitions and interactive activities that enhance further explanation.

[Free Registration/Login Required] This flipchart defines Parallel, Intersecting, and Perpendicular lines. It also provides opportunities to practice working with Parallel, Intersecting and Perpendicular Lines!

Angles, parallel lines, and transversals are explained through examples and a video lesson. [1:01]

The student will derive and use the slope and midpoint formulas to verify geometric relationship that include parallelism and perpendicularity of lines. Then, the student will determine an equation of a line parallel or perpendicular to...

Three resources for teaching slopes and equations of lines: a lesson with a formula for finding slope, different equations for lines, and several examples; a fourteen-question quiz covering slope, perpendicular and parallel lines, and...

Explore parallel and perpendicular lines on grids.