Math Is Fun
Math Is Fun: Lines of Symmetry of Plane Shapes
Looks at the lines of symmetry in different types of polygons. Includes ten practice questions. Each question is accompanied by an explanation of the answer.
CK-12 Foundation
Ck 12: Elem Math: Identifying Straight Lines in Various Shapes
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on determining if there are straight lines in various two dimensional shapes.
Oswego City School District
Regents Exam Prep Center: Reflections: Line and Point
Lesson and activities focusing on line reflection. Here you will find a detailed explanation of the concept with picture examples, opportunities for interactive practice, and supporting classroom activities in the teacher resource pages.
CK-12 Foundation
Ck 12: Geometry: Basic Geometric Definitions
[Free Registration/Login may be required to access all resource tools.] In this lesson students identify points, rays, lines, and line segments. Students examine guided notes, review guided practice, watch instructional videos and...
Mangahigh
Mangahigh: Algebra: Test to See if a Point Is on a Line
Students explore the concept of determining if points form a line by working through an online tutorial and then attempting a ten question quiz that increases in difficulty as questions are answered correctly.
Shodor Education Foundation
Shodor Interactivate: Lesson: Lines, Rays, Line Segments, & Planes
This robust lesson plan for upper elementary and middle school grades introduces the concepts for lines, rays, line segments, and planes. Resources are linked to it and ready for your use.
Math.com
Math.com: Coordinate Geometry
The lesson investigates coordinate geometry. Definitions, examples, and a worksheet are available.
CK-12 Foundation
Ck 12: Elem Math: Counting Straight Lines and Curves in Various Shapes
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on counting lines and curves in various two dimensional shapes.
National Council of Teachers of Mathematics
The Math Forum: Line Symmetry
This site from The Math Forum is a great site if you are looking for activities to engage your students in learning about line symmetry. Peruse this collection of activities for one or two or four that would be right for your students....
ClassFlow
Class Flow: Lines, Rays, Line Segments
[Free Registration/Login Required] This lesson is an introduction to the basic geometric figures: lines, rays, and line segments. The definition and naming conventions for each figure are explained. An assessment section follows.
ClassFlow
Class Flow: Classifying Lines
[Free Registration/Login Required] This flipchart introduces students to the different types of lines and how to classify them.
Cuemath
Cuemath: Line Segment
In this lesson, you will learn about the various types of lines, line segments, rays, the line segment symbol, and line segment examples. Check out the interactive examples and try your hand at solving a few interesting practice...
ClassFlow
Class Flow: Geometry Line Vote
[Free Registration/Login Required] In this lesson the teacher will use geometry and spatial sense to distinguish between point, ray, line, line segment and angle. The students will review vocabulary for these terms and then...
Khan Academy
Khan Academy: Classifying Shapes by Line and Angle Types
In this exercise, students practice classifying shapes by line and angle types. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Math Planet
Math Planet: Geometry: Measure and Classify an Angle
Explains the terms and symbols used to discuss line angles, what an angle is, and the types of angles. Includes short video lesson demonstrating how to use a protractor to measure an angle. [0:57]
CK-12 Foundation
Ck 12: Rotations: Line Design
[Free Registration/Login Required] Students will explore how to determine the coordinates of a rotated figure by adjusting the points on the line. Click challenge me to answer practice questions and click learn more to watch a video.
PBS
Pbs Learning Media: Two Points Determine a Line
In this video segment [2:10] from Cyberchase, Digit must make a straight line between the two points and then follow the path created.
CK-12 Foundation
Ck 12: Number Lines: Freezing Cold Comparison
[Free Registration/Login Required] Students will explore number lines by using themometers as well as graph inequalities. Click challenge me to answer practice questions and click learn more to watch a video.
Mr. Martini's Classroom
Mr. Martini's Classroom: Geometry Special Angle Pairs and Parallel Transversals
Students are challenged to identify and measure angles created by parallel lines and a transversal as well as complementary and supplementary pairs.
ClassFlow
Class Flow: Basic Geometry Vocabulary
[Free Registration/Login Required] This flipchart is an introduction to geometry vocabulary and elementary geometric figures. Activities ask students to match vocabulary and definitions and label figures. Assessment questions follow.
Texas Instruments
Texas Instruments: Coordinate Geometry the Equation of a Line
This activity teaches students the relationship between the slope, y-intercept, and the equation of a line.
Texas Instruments
Texas Instruments: Traveling Shapes Motion Geometry
In this activity, students describe how to move a shape from one place to another in a plane. They learn about translations, rotations, and line reflections. [Requires Adobe Reader.]
Other
Earth Measure: Native American Geometry Designs: Mathematical Landscaping
If you want to plant a class garden, this is a great resource for combining geometry, Native American studies, and rocks.
National Council of Teachers of Mathematics
Nctm: Illuminations: Interactive Geometry Dictionary: Lines in Geometry
The applets in this Interactive Geometry Dictionary (IGD) will show you how to find the area of some common shapes.
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