Students construct tangram pieces. Then they make observations and explore patterns with the pieces.

Pupils circumscribe a circle about a triangle. They construct a triangle using Cabri Jr and then circumscribe it. They then use knowledge of perpendicular bisectors and circumcenters to locate the center of the circle and then...

High schoolers investigate the sum of the measures of the angles of a triangle. They draw a triangle and measure the interior angles. Using Cabri Jr., learners find the sum of the measures of the interior angles. The lesson provides an...

For this angles worksheet, students measure angles to make triangles and cut them out to make a Christmas tree. Students draw and cut 5 triangles to make their tree.

Learners explore pyramids. In this math lesson, students discuss where they have seen examples of pyramids. Learners classify pyramids as three-dimensional figures and identify their attributes.

Second graders write a Math Moments journal.

Introduces the concept of 3D shapes by learning the definition, types, properties, and three dimensions. Check-out the solved examples for better understanding and try your hand at solving a few interactive questions at the end of the page.

[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.

[Free Registration/Login may be required to access all resource tools.] Students practice counting sides and vertices in various two dimensional shapes.

A succinct test for assessing geometry concepts. Assessment is scored online giving immediate feedback. An excellent assessment tool.

This lesson focuses on the properties of triangles, a closed shape that has three sides, three vertices, and and three internal angles. There are different types of triangles such as a right triangle, obtuse, and acute based on the...

Use interactive geometry software to construct an equilateral triangle that maintains its shape even if you move its vertices.

An introduction to a type of three-dimensional shape called a polyhedron. See examples and play with an interactive animation, showing the faces, vertices, and edges of pyramids, which are a type of polyhedron.

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the flat surfaces or faces of three dimensional shapes.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to count the number of faces in various three dimensional shapes.

The circle is one of four different shapes which can be created using "slices" through a cone, a 3-dimensional solid that has a circular base joined to a single point (called the vertex) by a curved side. If you tilt a cone, you get an...

This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices if a quadrilateral, if the shape is a square in a coordinate plane. It is 2 of 2 in the series titled...

Learn about platonic solids, a special type of polyhedra. Read a definition, make three-dimensional models using printouts, and play with an interactive animation, which will show you the faces, vertices, and edges on platonic solids:...

[Free Registration/Login Required] This flipchart helps students to analyze and compare various two-dimensional shapes according to the vertices, sides and parallel lines. It features "containers" created in Version 3 (can be used with...

An interactive game to find number of edges, surfaces and vertices of different geometric shapes.

Can you help Leela find objects of different 3D shapes in her parents' tea store?

Are you looking for a very basic website that will explain the basic properties of a triangle? Use this site to learn about the properties of equilateral triangles, isosceles triangles, right triangles,and scalene triangles. There are...

Do you need practice remembering or learning different geometry vocabulary words and definitions? This word search is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if you are...

Do you need practice remembering or learning different geometry vocabulary words and definitions? The flash cards at this web site are for you! There is a link to a list of terms with definitions you can click if you want to see if you...