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# Online games and resources for shapes, quadrilaterals, triangles, and polygons

This is an annotated and hand-picked list of games and other online resources related to shapes, quadrilaterals, triangles, and polygons, suitable for grades 1-5.

## Shapes / Polygons

Buzzing with Shapes
Tic tac toe with shapes; drag the counter to the shape that has that amount of sides.
www.harcourtschool.com/activity/buzz/buzz.html

Patch Tool
An online activity where the student designs a pattern using geometric shapes.
illuminations.nctm.org/ActivityDetail.aspx?ID=27

Polygon Matching Game
Learn all the common polygons by playing this fun, timed matching game.
www.mathplayground.com/matching_shapes.html

Shapes Identification Quiz from ThatQuiz.org
An online quiz in a multiple-choice format, asking to identify common two-dimensional shapes. You can modify the quiz parameters to your liking.
www.thatquiz.org/tq-f/math/shapes

Star Polygons Worksheets
Free worksheets for creating different star polygons by connecting the vertices of regular polygons. Also includes a few worksheets with blank regular polygons.
www.childrensbestactivities.com/star-polygons.php

Math Mammoth Geometry 1
A textbook/workbook together for grades 3-5, written by the owner of this site. You will learn geometry by drawing. Topics covered include angles, rectangles, parallelograms, polygons, circles, area, perimeter, and volume. Price: \$6.90 download, \$12.70 printed.
www.mathmammoth.com/geometry_1.php

Looking at Polygons
An interactive lesson with explanations and quiz from Absorb Mathematics course written by Kadie Armstrong, a mathematician.
www.absorblearning.com/mathematics/demo/units/KCA007.html

Polygon Sort
Drag and drop the polygons in the correct place in the diagram.

Interactivate! Tessellate
An online, interactive tool for creating your own tessellations. Choose a shape, then edit its corners or edges. The program automatically changes the shape so that it will tessellate (tile) the plane. Then push the tessellate button to see your creation!
www.shodor.org/interactivate/activities/Tessellate

Polygon Playground
Drag various colorful polygons to the workarea to make your own creations!
www.mathcats.com/explore/polygons.html

Tangram puzzles for kids
Use the seven pieces of the Tangram to form the given puzzle. Complete the puzzle by moving and rotating the seven shapes.
www.abcya.com/tangrams.htm

Interactive Tangram Puzzle
Place the tangram pieces so they form the given shape. Uses Java.
nlvm.usu.edu/en/nav/frames_asid_112_g_2_t_1.html

Logic Tangram game
Note: this uses four pieces only. Use logic and spatial reasoning skills to assemble the four pieces into the given shape.
www.mathplayground.com/tangrams.html

Tangram
Interactive tangram pieces. Build your own shapes or try to make the given shapes.
www.crickweb.co.uk/assets/resources/flash.php?&file=tangram

#### Math Mammoth Early Geometry

A self-teaching worktext for 1st - 3rd grade that covers basic shapes, right angle, symmetry, area, perimeter, and solids.

See more topical Math Mammoth books

See all the different kinds of quadrilateral "in action". You can drag the corners, see how the angles change, and observe what properties do not change.

Dynamic Rectangle and Parallelogram
Drag the sides of a dynamic parallelogram or a rectangle to explore these concepts.
www.nctm.org/standards/content.aspx?id=25040

Make free printable worksheets for classifying (idenfitying, naming) quadrilaterals. There are seven special types of quadrilaterals: square, rectangle, rhombus, parallelogram, trapezoid, kite, scalene, and these worksheets ask students to name the quadrilaterals among these seven types.

First, the quest asks you to choose all the quadrilaterals with the given properties. After several of those types of activities follows a quiz.

Investigate the properties of square, rectangle, rhombus, an isosceles trapezoid, and a non-isosceles trapezoid in this dynamic, online activity.
www.glencoe.com/sites/texas/student/mathematics/assets/interactive_lab/geometry/G_08/G_08_dev_100.html

A virtual manipulative that challenges students to "draw" quadrilaterals with specific characteristics by moving vertices on a coordinate grid. Includes some challenging vocabulary, which is explained below the activity, such as orthodiagonal quadrilateral, cyclic, or convex quadrilateral.
www.uff.br/cdme/jcq/jcq-html/jcq-en.html

Properties of Kites
Investigate the interior angles and diagonals of kites with these interactive tools.
math.kendallhunt.com/x19428.html

#### Math Mammoth Early Geometry

A self-teaching worktext for 1st - 3rd grade that covers basic shapes, right angle, symmetry, area, perimeter, and solids.

See more topical Math Mammoth books

## Triangles

Triangle Explorer
Practice calculating the area of a triangle using this interactive tool.
www.shodor.org/interactivate/activities/TriangleExplorer

Classify Triangles Worksheets
Make free printable worksheets for classifying triangles by their sides, angles, or both.
/worksheets/classify_triangles.php

Triangle Classification at Cut The Knot
A tutorial and an applet about classifying triangles by their sides and angles. In the applet, you can drag any of the vertices of the triangle, and the applet tells you whether your triangle is acute, obtuse, or right, or equilateral, isosceles, or scalene.
www.cut-the-knot.org/triangle/Triangles.shtml

Rags to Riches: Classify Triangles by Sides and Angles
Answer multiple-choice questions about the angles of a triangle and classification of triangles in a quest for fame and fortune.
www.quia.com/rr/457498.html

Identify Triangles Quiz
A simple multiple-choice quiz about identifying (classifying) triangles either by their sides or angles. You can modify some of the quiz parameters, such as the number of problems in it.
www.thatquiz.org/tq-A/?-j1-l34-p0

 Dr. Math Introduces Geometry: Learning Geometry is Easy! Just ask Dr. Math! A supplement to middle school geometry, Dr. Math Introduces Geometry has a light tone, clear layout, and humorous cartoons by Jessica Wolk-Stanley. The best part is that the explanations to math questions are accurate and clear. You'll find answers to dozens of real questions from students who needed help understanding the basic concepts of geometry. This book covers angles, triangles, quadrilaterals, area, perimeter, Pi, circle parts, polyhedra, surface area, volume, nets, congruent transformations, and symmetry. Price ~\$12 new, ~\$1-6 used. 