• Developing mathematical arguments about the relationships among types of quadrilaterals and triangles
• Identifying angle bisectors, perpendicular bisectors, congruent angles, and congruent figures
• Constructing congruent and similar polygons, congruent angles, congruent segments, and parallel and perpendicular lines

Geodesic Dome Challenge:
Students Build a giant geodesic dome out of newspaper triangles and predict how many magazines it will support.

Geometry:
A List of geometry lessons.

Geography Geometry
Students should be able to use visualization,  spatial reasoning, and geometric modeling to solve problems.

CPS K12
This is a set of structured daily lesson plans that covers the difference between 2 and 3 dimensional figures that includes an introduction to the basic 3-D shapes. It leads to surface area and volume (Day 96-99)

Visualizing Transformations:
Students use the interactive figures in this lesson to explore translations and reflections of geometric figures.

Geometry Through Art:
Students use a pencil and a straightedge (ruler) to design geometric figures.

 An Introduction To Quadrilaterals: 
This lesson is designed to introduce students to quadrilaterals. Included in this lesson are discussions of parallelograms, rectangles, and trapezoids.

Shape & Space in Geometry

CPS K12
44 pages loaded with lesson plans, examples, and assessments on surface and volume.  You only need to scroll to this topic.

Pyramid: 
Cut-and-fold pattern for a 1/30,000 scale replica of the great pyramid at Giza.

Worksheets provided.
You only need to select appropriate topic and select create worksheet on the next page that follows.

Math
This resource concentrates on three types of space figures that are not polyhedrons-cylinder, cone, and sphere.

Names of the Geometric Figures: 
An illustration with descriptions of several basic polygons.

 Figures and Polygons:
A list of polygons with illustrations and definitions.

Geometry Problem of the Week: 
A resource of problem solving activities related to geometry.

Geometric Figures Fast Facts:
Definitions of terms and basic geometric figures.

Interactive Shapes: 
Nice interactive presentations of a number of geometric concepts and principles. Follow instructions and explore.

William's Home Page: 
A list of activities to enrich mathematical reasoning.

Chickscope: 
Students use eggs to explore geometric concepts.

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