National Council of Teachers of Mathematics
Nctm: Illuminations: Geometric Solids
An interactive game to find number of edges, surfaces and vertices of different geometric shapes.
CK-12 Foundation
Ck 12: Elem Math: Identifying Vertices Edges and Faces in 3 D Shapes
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on identifying faces, edges and vertices of three dimensional shapes.
BBC
Bbc: Bitesize: Ks2: What Are the Properties of 3 D Shapes?
Watch a video and complete the activities to learn about the properties of 3D shapes.
Better Lesson
Better Lesson: Attributes of Shapes
Students will identify the attributes of shapes and use those attributes to draw and describe shapes. This instructional activity contains a detailed plan, pictures of student work, and videos of the instructional activity in action.
Other
Geeks for Geeks: Graph and Its Representations
The choice of graph representation is situation-specific. It totally depends on the type of operations to be performed and ease of use. This reference explains the most commonly used representations of a graph: Adjacency Matrix and...
Other
Free Codecamp: How to Think in Graphs
In this article, we're going to demonstrate various applications of graph theory. These applications will contain detailed illustrations. As the author states, if you've been looking for a "graph theory and everything about it tutorial...
Math Open Reference
Math Open Reference: Diagonals of a Rectangle
Learn about the diagonals of a rectangle with this helpful reference tool. Provides a detailed definition, examples, and interactive activities that enhance further explanation. Includes links to related topics.
Math Open Reference
Math Open Reference: Circumcircle of a Triangle
A complete reference guide to the circumcircle of a triangle. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
E-learning for Kids
E Learning for Kids: Math: Tea Store: 3 D Space
Can you help Leela find objects of different 3D shapes in her parents' tea store?
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Polyhedrons
This in-depth paper examines the idea of convexity. Euclid's Elements, the first geometry textbook, assumed convexity without mentioning the term.
The Math League
The Math League: Figures and Polygons
This website has basic definitions for most polygons, regular and irregular.
Quia
Quia: Introduction to Angles
Use this website to practice angle definitions using a matching game format.
Quia
Quia: Introduction to Angles Flashcards
Use this website to practice angle definitions using a flash card format.
Quia
Quia: Introduction to Angles Concentration
Use this website to practice angle definitions using a concentration game format.
Quia
Quia: Introduction to Angles: Word Search
Use this website to practice angle definitions using a word search format.
Math Is Fun
Math Is Fun: Acute Angle
This very basic website gives a clear, simple explanation of what an acute angle is.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Angle Basics
Find a quick, concise explanation of angles and types of angles. Several examples are given to help you understand how angles are formed and the different types of angles.
ClassFlow
Class Flow: 3 D Objects and Nets
[Free Registration/Login Required] This is a review of solid figures, nets, and counting faces, nets and vertices in 3 dimensional figures. There is a 5 question Activote session at the end of the flipchart.
ClassFlow
Class Flow: Build 3 D Shapes
[Free Registration/Login Required] In this interactive flipchart students use colored lines and circles to build 3D shapes to learn and review.
Math Is Fun
Math Is Fun: Reflex Angle
This math tutorial provides an illustrated explanation of a reflex angle.
Math Is Fun
Math Is Fun: Making 3 D Solids
This tutorial features templates and instructions to make the following solids: tetrahedron, cube, octahedron, dodecahedron, and icosahedron.
University of Cambridge
University of Cambridge: Nrich: Games the Triangle Game
Use this game to improve your knowledge and understanding of triangles and naming vertices. Just read and follow the instructions! [Requires Java.]