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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.
The Math League
The Math League: Basic Terms: Parallel Lines
This tutorial provides an explanation and example of parallel lines.
University of Regina (Canada)
University of Regina: Math Central: Introduction to Slope for Middle Years Mathematics
This collection of five middle school math lessons covers the topic of plane geometry, specifically the concept of slope. The first lesson introduces students to plotting points on a Cartesian grid using a Geoboard. Lesson two moves them...
Math Is Fun
Math Is Fun: Parallel Lines
Students learn about parallel lines and pairs of angles. Definitions and examples are included.
ClassFlow
Class Flow: Angles in Geometry
[Free Registration/Login Required] This flipchart is a look at angles in geometry. Drawing, labeling, measuring, special angles: (right, straight, acute, obtuse) and congruence.
ClassFlow
Class Flow: Circles Geometry
[Free Registration/Login Required] Students identify segments and lines related to circles and the properties of a tangent to a circle.
PBS
Pbs Learning Media: Finding the Intersection
In this Cyberchase video, Inez and Digit identify the location of the transformatron using their knowledge of parallel and intersecting lines.
Annenberg Foundation
Annenberg Learner: Geometry: Circles: Inscribed Angles
Study inscribed angles in semicircles and quarter-circles. What conjectures can you make about the measure of an inscribed angle in semi- or quarter-circles?
Oswego City School District
Regents Exam Prep Center: Bisect a Line Segment and an Angle
This step-by-step tutorial teaches students how to construct a bisector of a segment and the bisector of an angle.
Oswego City School District
Regents Exam Prep Center: Copy a Line Segment and an Angle
This site provides a step-by-step method to construct congruent segments and angles with a straight edge and compass.
ClassFlow
Class Flow: Blast Off With Geometry
[Free Registration/Login Required] Learn about polygons, angles, parallel, intersecting and perpendicular lines as you journey into space. Included is an activote quiz.
CK-12 Foundation
Ck 12: Geometry: Rigid Transformations
[Free Registration/Login may be required to access all resource tools.] Identify different types of transformations.
Oswego City School District
Regents Exam Prep Center: Intuitive Symmetry: Point, Line, Plane, Rotational
Investigate the concept of symmetry at this test prep site. See detailed definitions and picture examples, answer the questions in the interactive practice pages, and do the classroom activity where students use a digital camera to...
Government of Alberta
Learn Alberta: Math Interactives: Exploring Tessellations and Transformations
Investigate tessellations using this interactive Learn Alberta math resource. Students will explore transformations, namely line symmetry, rotation symmetry, and translation occurring within a tessellated pattern. Be sure to follow the...
PBS
Pbs Learning Media: Two Sightings, Different Information
Jackie and Matt are looking at the same object along two different lines, in this video segment from Cyberchase.
CK-12 Foundation
Ck 12: Absolute Value: Picket Fence Painting
[Free Registration/Login Required] Students use a real world situtation to explore absolute value and how to find the distance between two numbers on a number line. Click challenge me to answer a practice question and click learn more to...
Quia
Quia: Geometric Terms Flash Cards
Do you need practice remembering or learning different geometry vocabulary words and definitions? The flash cards at this web site are for you! There is a link to a list of terms with definitions you can click if you want to see if you...
Quia
Quia: Geometric Terms Word Search
Do you need practice remembering or learning different geometry vocabulary words and definitions? This word search is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if you are...
Quia
Quia: Geometric Terms Concentration
Do you need practice remembering or learning different geometry vocabulary words and definitions? This concentration game is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if...
Quia
Quia: Geometric Terms Matching
Do you need practice remembering or learning different geometry vocabulary words and definitions? This matching game is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if you are...
National Council of Teachers of Mathematics
The Math Forum: Bricks Activity, Teacher Lesson Plan
Builders of brick walls need to be especially aware of fault lines which can easily lead to the collapse of the wall. Students are challenged, here, to use polyminoes to design patterns for brick walls which do not contain fault lines....
Houghton Mifflin Harcourt
Houghton Mifflin Harcourt: Saxon Activity Center Real World Investigation: Symmetry Around Us [Pdf]
Use this internet lesson to explore different types of symmetry in nature. Learners examine line symmetry, rotational symmetry, and bilateral symmetry. An integrated math, language art, and art lesson. Acrobat Reader required.
CK-12 Foundation
Ck 12: Basic Geometric Definitions: Collinear Constellations
[Free Registration/Login Required] Students explore basic geometric definitions by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about the...
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