CK-12 Foundation
Ck 12: Geometry: Relation of Polygon Sides to Angles and Diagonals
[Free Registration/Login may be required to access all resource tools.] Find interior angle measures of polygons by drawing diagonals to create triangles.
CK-12 Foundation
Ck 12: Geometry: Supplementary and Complementary Angle Pairs
[Free Registration/Login may be required to access all resource tools.] Classify supplementary and complementary pairs of angles.
CK-12 Foundation
Ck 12: Geometry: Triangle Classification by Side Lengths
[Free Registration/Login may be required to access all resource tools.] Classify different types of triangles by their side lengths.
CK-12 Foundation
Ck 12: Geometry: Unknown Dimensions Using Formulas Grades 6 7
[Free Registration/Login may be required to access all resource tools.] Use formulas to solve for unknown dimensions of squares and rectangles.
CK-12 Foundation
Ck 12: Geometry: Angle Measurement Grade 6
[Free Registration/Login may be required to access all resource tools.] Learn how to use a protractor to draw angles.
CK-12 Foundation
Ck 12: Geometry: Angle Classification Grade 6
[Free Registration/Login may be required to access all resource tools.] Classify acute, right, obtuse, and straight angles.
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.
CK-12 Foundation
Ck 12: Geometry: Problem Solving Plan, Solve a Simpler Problem
[Free Registration/Login may be required to access all resource tools.] Solve a simpler problem first to help you solve a more difficult word problem.
CK-12 Foundation
Ck 12: Geometry: Regular and Irregular Polygons
[Free Registration/Login may be required to access all resource tools.] Understand the difference between regular and irregular polygons.
CK-12 Foundation
Ck 12: Geometry: Forms of Ratios
[Free Registration/Login may be required to access all resource tools.] This concept teaches students what a ratio is and how to use one. Students examine guided notes, review guided practice, watch instructional videos and attempt...
CK-12 Foundation
Ck 12: Geometry: Radius or Diameter of a Circle Given Area
[Free Registration/Login may be required to access all resource tools.] Find the radius or diameter of a circle given its area.
CK-12 Foundation
Ck 12: Geometry: Triangle Area Grades 6 7
[Free Registration/Login may be required to access all resource tools.] Find the areas of triangles given their base and height dimensions.
CK-12 Foundation
Ck 12: Geometry: Volume of Prisms Using Unit Cubes
[Free Registration/Login may be required to access all resource tools.] Use unit cubes to demonstrate the volume of a prism.
National Council of Teachers of Mathematics
The Math Forum: Using Geoboards in the Classroom
A thorough look at the extensive uses of geoboards in the classroom. Links are listed which give introductory information on geoboards - for teachers new to using them. Then, lesson plans are provided for using geoboards in teaching...
Homeschool Math
Homeschool Math: Equilateral, Isosceles, and Scalene Triangles
This geometry lesson defines equilateral, isosceles, and scalene triangles, and has a variety of exercises, including drawing exercises.
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.
Cuemath
Cuemath: Solid Shapes
Explore the world of solid shapes in this mini-lesson. Provides a definition, interactive examples, and interesting practice questions that help with understanding.
Other
Math4children.com: Math Worksheets for Middle School
Download these math worksheets to assist you in the concept you are covering in your middle school math classroom. Content includes pre-algebra and algebraic equations, decimals, fractions, geometry, graphs and coordinates and...
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.
National Council of Teachers of Mathematics
The Math Forum: Multicultural Math Fair: Navajo Burntwater Designs
Simple lesson designed to help students learn the geometric concepts of translation, reflection, and symmetry by creating Navajo weaving patterns. Includes templates and instructions and is available in English and Spanish....
National Council of Teachers of Mathematics
The Math Forum: Multicultural Math Fair: Sonya's Symmetry
Straightforward lesson designed to introduce students to symmetry and reflection using MIRA mirrors. Includes two worksheets--instructions and activities are available in English and Spanish.
National Council of Teachers of Mathematics
The Math Forum: Multicultural Math Fair: Srinivasa's Spheres
Straightforward lesson that introduces students to pi by letting them measure real objects and solve a challenge problem. Includes instructions and a "Data Sheet" for keeping track of measurements. Available in English and Spanish.
NumberNut
Number Nut: Shapes, Symbols, and Colors: 3 D Shapes
This lesson describes three dimensional shapes and provides two interactive practice activities.
NumberNut
Number Nut: Identifying Traits
Investigate the relationship between shapes and identifying traits or characteristics. A concise lesson that explores physical, chemical, and observable traits in the shapes around us. Build on this knowledge by playing the Web Colors...
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