Curated OER
Angle Action
Young scholars measure and label specified angles. In this angles lesson, students use a protractor to find angles that are acute, obtuse, and reflexive. Young scholars then label each angle and match the angles the correct definition....
Scholastic
Scholastic: Study Jams! Math: Geometry: Lines of Symmetry
Explore lines of symmtery with this interactive lesson regarding lines of symmetry.
Cuemath
Cuemath: Lines
Learn all about lines. This lesson targets what is a line and the different types. Check-out the interactive simulations to know more about the lesson and try your hand at solving a few interesting practice questions at the end of the page.
CK-12 Foundation
Ck 12: Perpendicular Lines
[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...
CK-12 Foundation
Ck 12: Geometry: Lines of Symmetry
[Free Registration/Login may be required to access all resource tools.] Identify line, bilateral, and rotational symmetry.
Government of Alberta
Learn Alberta: Math Interactives: Exploring Circle Geometry Properties
Investigate circles, namely their angles, chords, and tangents using this highly interactive Learn Alberta math. Explore a number of circle geometry properties that can be used to determine unknowns. Be sure to follow the link to the...
Mr. Martini's Classroom
Mr. Martini's Classroom: Basic Geometry: Points, Lines, and Angles
Students can review basic geometric terms using these self-check, multiple choice questions. Three levels of questions are provided.
Better Lesson
Better Lesson: Coordinate Grid and Geometry
Learners make connections between the coordinate grid and Geometry by finding the distance of line segments using the coordinate plane. This lesson includes a detailed lesson plan, slides containing notes and problems, and a...
CK-12 Foundation
Ck 12: Geometry: Intersecting and Parallel Lines
[Free Registration/Login may be required to access all resource tools.] Identify intersecting and parallel lines.
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.
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.
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...
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.]
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