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PBS
Pbs: Mathline: Tessellations Wow! [Pdf]
An integrated geometry instructional activity on spatial sense in which students identify and use different shapes to create a tessellation. "Through a variety of modalities such as writing, music, art, poetry, and literature, students...
Other
Gvsu: Quadrilateral Hunt
The learning activity asks students to identify quadrilaterals by characteristics rather than appearance. Learners drag the vertices of the shape to reveal the true shape of the quadrilateral. [Requires Java.]
Other
Generalization
Learn how to construct convex polygons and the mathematical foundations of symmetry on this site.
Quia
Quia: Polyatomic Ions Quiz
This site gives you a little Quiz about how much you really know about polygons.
Texas Instruments
Texas Instruments: Investigating Properties of Trapezoids
This activity uses the graphing calculator to investigate trapezoids. Numerous supplementary materials are included. [Requires Adobe Reader.]
Texas Instruments
Texas Instruments: Constructing Quadrilaterals
In this activity, students will construct different types of quadrilaterals from the quadrilateral hierarchy. This activity asks for constructions based on a minimal definition of the quadrilateral. The activity will reinforce the...
Math Planet
Math Planet: Geometry: Properties of Parallelograms
The properties of parallelograms are explained through examples and a video lesson. [0:53]
Scholastic
Scholastic: Study Jams! Math: Geometry: Classify Quadrilaterals
After you explore the step by step lesson to classify quadrilaterals sing some karaoke and then test your knowledge.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Teselacion Del Plano
In Spanish. Gain your knowledge of tessellation with this interactive activity. Topics include identifying regular and semi-regular tessellations and figures that will tessellate. [Requires Java.]
Math Open Reference
Math Open Reference: Quadrilaterals
A complete reference guide to quadrilaterals including squares, rectangles, parallelograms, trapezoids, and rhombus. It provides definitions and interactive activities that enhance further explanation.
McGraw Hill
Glencoe Mathematics: Online Study Tools: Self Check Quiz on Quadrilaterals
The online assessment demonstrates knowledge of concepts utilized in Geometry. The multiple choice questions test students on quadrilaterals. Topics include rhombus, parallelogram, and interior angles.
McGraw Hill
Glencoe Mathematics: Online Study Tools: Classifying Quadrilaterals
This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of classifying quadrilaterals.
Other
National Council of Supervisors of Mathematics:properties of Quadrilaterals
National Council of Supervisors of Mathematics: Properties of Quadrilaterals provides a teacher learning module on how to effectively teach properties of quadrilaterals and resources that would help to do this.
Other
National Council of Supervisors of Mathematics: Properties of Quadrilaterals
National Council of Supervisors of Mathematics: Properties of Quadrilaterals provides a geometric design learning module, on how to effectively teach properties of quadrilaterals which is used to develop skills in teachers to aide in...
Mangahigh
Mangahigh: Shape: The Angles Inside a Quadrilateral
Test your knowledge of the sum of angles inside a quadrilateral.
Mangahigh
Mangahigh: Shape: Recognize a Square and Rectangle
Test your knowledge of the similarities and differences between squares and rectangles.
Mangahigh
Mangahigh: Shape: Recognize Quadrilaterals
Determine quadrilaterals based on parallel sides.
Mangahigh
Mangahigh: Shape: Facts About Quadrilaterals
Test your knowledge of identifying quadrilaterals.
Mangahigh
Mangahigh: Pyramid Panic: Basic Shapes to Advanced Geometry
Guide a mummy safely through the burial chambers of a pyramid as you solve length and area problems in basic to advanced geometry. There are four game zones that deal with circles and triangles, quadrilaterals, the Pythagorean Theorem,...
CK-12 Foundation
Ck 12: Geometry: Area of a Parallelogram
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the area of a parallelogram given its base and height. Students examine guided notes, review guided practice, watch instructional videos...
CK-12 Foundation
Ck 12: Elem Math: Identifying Quadrilaterals by Description
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to identify which type of quadrilateral matches the description given. Includes video demonstrating a sample problem...
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Quadrilaterals
Find a quick, concise explanation of a quadrilateral. Examples are given and clearly explained.
Varsity Tutors
Varsity Tutors: Hotmath: Graphing Calculator Practice Problems: Quadrilaterals
Practice using your graphing calculator for constructing a parallelogram, a rhombus, a kite, a trapezoid, an isosceles trapezoid, a rectangle, and a square. If you get stumped or if you would like to check your work, then select the View...