University of Cambridge
University of Cambridge: Maths and Sports: Sports Equipment
Sports such as hockey, football, basketball and tennis use balls of different sizes. Can you arrange a selection of different balls in a line each touching the next to make the shortest line? This activity offers opportunities for...
National Council of Teachers of Mathematics
Nctm: Illuminations: Isometric Drawing Tool
This site includes an interactive math tool to create drawings on isometric dot paper. You can draw figures using edges, faces, or cubes. Rotate and color your drawings, and view them in 3D or 2D.
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,...
University of Regina (Canada)
University of Regina: Math Central: Lesson: Mr. Z's 5 Minute Game of Geometric Pandemonium
Students make a series of geometric drawings of points, obtuse angles, rays, polygons, and the like. Each child is given one but not allowed to show anyone else. The drawing is then taped to the back of the child in front of them. The...
PBS
Pbs Learning Media: Cross Sections of a Cube
This interactive exercise focuses on discovering the relationships between two and three-dimensional shapes.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Build a Hexagon [Pdf]
Play a game to build a hexagon.
Quia
Ixl Learning: Area of Rhombuses
Brush up on your math skills relating to the area of rhombuses then try some practice problems to test your understanding.
Quia
Ixl Learning: Area of Triangles
Brush up on your math skills relating to the area of triangles then try some practice problems to test your understanding.
Quia
Ixl Learning: Rectangles
Brush up on your math skills relating to rectangles then try some practice problems to test your understanding.
Quia
Ixl Learning: Squares
Brush up on your math skills relating to squares then try some practice problems to test your understanding.
CK-12 Foundation
Ck 12: Elem Math: Counting the Number of Different 2 D Shapes in a Set of Figures
[Free Registration/Login may be required to access all resource tools.] The video defines a triangle by the number of sides and then determines which of the figures in the diagram are triangles. The video is followed by additional...
The Math League
The Math League: Figures and Polygons
This website has basic definitions for most polygons, regular and irregular.
National Council of Teachers of Mathematics
Nctm: Figure This: Fire Hydrant
Discover how the geometric shape of an object directly relates to its usefullness in this math challenge from the NCTM Math Challenges for Families collection. A one page activity that you can print or download.
PBS
Pbs: Geometry and Classification of 2 D Figures: Bianca Busts a Move
In this video from Cyberchase, Bianca breaks her friend's tabletop when she's practicing dance moves in his living room. She uses measurement and geometry to get a new piece of wood that will fit the table exactly. The accompanying...
Khan Academy
Khan Academy: Interpreting Scale Drawings
Students practice interpreting scale models, receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Oswego City School District
Regents Exam Prep Center: Area of Polygons and Circles
How would you find the area of a polygon or circle? Explore this concept with engaging activities at this test prep site. Here you will find detailed problem solving strategies with accompanying visuals, a reference table with formulas,...
PBS
Pbs Learning Media: Classifying Polygons
This interactive diagram focuses on sorting polygons by common properties and then you select the correct label for each section of the Venn Diagram.
PBS
Pbs Learning Media: Patterns in Nature
In this video segment [3:25] from Cyberchase, a plant expert shows Bianca the patterns and symmetry found in nature.
Khan Academy
Khan Academy: Nets of Polyhedra
Practice matching 2D nets to the 3D shapes the fold up into. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Cross Sections of 3 D Objects
Practice your knowledge of all possible cross-sections of common 3D objects. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Illustrative Mathematics
Illustrative Mathematics: G Gmd, G Mg Tennis Balls in a Can
In this task, students investigate the volume of tennis balls and their cylindrical container, the empty space around the balls, different ways of slicing them, and what their visualizations will look like. Aligns with G-GMD.B.4 and...