Lesson Plan
Curated OER

Polygons All Around Us!

For Teachers 9th - 12th
Young scholars explore the concept of polygon properties. In this polygon properties lesson, students draw polygons with different numbers of sides such as pentagons, octagons, hexagons, etc. Young scholars identify different geometric...
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Khan Academy

Khan Academy: Parallel and Perpendicular Lines From Graph

For Students 9th - 10th Standards
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...
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Khan Academy

Khan Academy: Parallel & Perpendicular Lines From Graph

For Students 9th - 10th Standards
Given points that two lines go through or the graph of each line, classify the lines as parallel, perpendicular, or neither.
Unit Plan
Texas Education Agency

Texas Gateway: Coordinate Geometry: Parallel and Perpendicular Lines

For Students 9th - 10th Standards
Given characteristics of two lines, such as slopes and equations, the student will determine whether the lines are parallel, perpendicular, or neither.
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Equations of Perpendicular Lines

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers determining if two lines are parallel, perpendicular, or neither and finding the equation of perpendicular lines to a given line.
Unit Plan
Texas Education Agency

Texas Gateway: Making Conjectures About Parallel and Perpendicular Lines

For Students 9th - 10th Standards
The student will verify theorems about angles formed by parallel lines cut by a transversal and apply these relationships to solve problems.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Identifying Parallel and Perpendicular Lines

For Students 2nd - 4th Standards
[Free Registration/Login may be required to access all resource tools.] Students practice identifying parallel and perpendicular lines after watching a video tutorial.
Handout
Northeast Parallel Architectures Center, Syracuse University

Npac Reu Program: Parallel and Perpendicular Lines

For Students 9th - 10th Standards
Northeast Parallel Architecture Center, Syracuse University provides a brief definition of the slopes of parallel and perpendicular lines
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Perpendicular and Parallel Lines

For Students 9th - 10th Standards
Twenty-two problems present a variety of practice working with perpendicular and parallel lines. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...
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Khan Academy

Khan Academy: Write Equations of Parallel and Perpendicular Lines

For Students 9th - 10th Standards
Write the equation for a line that is a parallel or perpendicular to a line given in slope-intercept form and that goes through a specific point. Students receive immediate feedback and have the opportunity to try questions repeatedly,...
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Khan Academy

Khan Academy: Parallel and Perpendicular Lines From Equation

For Students 9th - 10th Standards
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.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Graphing Calculator: Parallel, Perpendicular, Slope, Transversal

For Students 9th - 10th Standards
Practice using your graphing calculator for drawing parallel lines, perpendicular lines, slope, and transversals. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly...
Activity
Texas Instruments

Texas Instruments: Parallel, Perpendicular, Neither

For Teachers 9th - 10th Standards
Students will investigate the relationship of the algebraic slopes of pairs of lines to the graphical relationship between the lines.
Unit Plan
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Perpendicular and Parallel Lines

For Students 9th - 10th Standards
Find a quick, concise explanation of what perpendicular lines are. An example is given and clearly explained. Also, parallel lines are explained.
Unit Plan
Khan Academy

Khan Academy: Identify Parallel and Perpendicular Lines

For Students 3rd - 5th Standards
Recognize parallel and perpendicular lines in geometric figures and pictures. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Khan Academy

Khan Academy: Draw Parallel and Perpendicular Lines

For Students 3rd - 5th Standards
Practice drawing parallel and perpendicular lines, line segments, and ray. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
eBook
Math Planet

Math Planet: Parallel and Perpendicular Lines

For Students 9th - 10th Standards
Provides examples and a video lesson that illustrates parallel and perpendicular lines.
eBook
Math Planet

Math Planet: Geometry: Angles, Parallel Lines and Transversals

For Students 9th - 10th Standards
Angles, parallel lines, and transversals are explained through examples and a video lesson. [1:01]
Whiteboard
ClassFlow

Class Flow: Parallel and Perpendicular Lines

For Teachers 9th - 10th Standards
[Free Registration/Login Required] This flipchart defines and gives opportunities to work with parallel and perpendicular lines. Prentice-Hall, bsee, Parallel, Perpendicular, 5.8, Algebra.
Activity
Texas Instruments

Texas Instruments: Parallel and Perpendicular Lines on Ti Smartview

For Teachers 9th - 10th Standards
This is an introductory lesson on graphing parallel and perpendicular lines. The students will have a good visual on how these lines relate to each other. This also illustrates how to determine equations in slope-intercept form of a line...
Activity
Texas Instruments

Texas Instruments: Perpendicular or Parallel?

For Teachers 6th - 8th Standards
Students can use TI 73 calculators to explore equations that create parallel and perpendicular lines. Teacher will use the screen capture feature of the Navigator system to display students graphs and equations to discuss observations to...
Activity
Texas Instruments

Texas Instruments: Parallel or Perpendicular What's Your Inclination?

For Teachers 9th - 10th Standards
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.]
Activity
Texas Instruments

Texas Instruments: Parallel and Perpendicular Slopes

For Teachers 9th - 10th Standards
This activity is for use as a formative assessment tool after the introduction and overview of parallel and perpendicular slopes.
Activity
Texas Instruments

Texas Instruments: Explore Parallel and Perpendicular Lines

For Teachers 9th - 10th Standards
Students can use a graphing calculator to explore graphs of parallel and perpendicular lines. Students will find that parallel lines have the same slope and different y-intercepts and that the slopes of two perpendicular lines are...