Looks at the lines of symmetry in different types of polygons. Includes ten practice questions. Each question is accompanied by an explanation of the answer.

Cross-sections are one way that two-dimensional objects are connected to three-dimensional objects.

Explore the volume of solid figures.

In this instructional activity, students will create a class quilt of nine patch paper quilt blocks using geometry.

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

Students attempt to make various shapes by rearranging the geometric shapes to form a tangram.

[Free Registration/Login Required] Answer questions about the halves and fourths of circles and rectangles, and collect coins for each correct answer.

Given a figure and a definition of a translation, draw the image. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.

Given a figure on the coordinate plane and the definition of a rotation about an arbitrary point, draw the image of that rotation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video,...

Given a figure on the coordinate plane and the definition of a rotation about the origin, draw the image of that rotation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or...

Given a figure and a definition of a reflection, draw the image. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.

Explore two and three dimensional geometric shapes by creating shapes based on descriptions.

During this activity, middle schoolers will create nets for prisms. They will find the volume and surface area of the shapes. They will also use interactive activities to review three-dimensional shapes.This lesson plan was created as a...

Third graders will use the bat houses we built as examples of various quadrilaterals.

Incorporating concepts in algebra, number sense, patterning, data collection, and geometry, this instructional activity engages students in various hands-on activities to explore the relationship between regular polygons and the number...

[Free Registration/Login may be required to access all resource tools.] Apply inscribed angle theorems.

[Free Registration/Login may be required to access all resource tools.] Recognize and describe visual or geometric patterns.

[Free Registration/Login may be required to access all resource tools.] This concept teaches students to solve for missing segments created by a tangent line and a secant line intersecting outside a circle.

[Free Registration/Login may be required to access all resource tools.] This concept teaches students about polyhedrons, Euler's Theorem, and regular polyhedrons.

[Free Registration/Login may be required to access all resource tools.] Apply Euler's Theorem.

[Free Registration/Login may be required to access all resource tools.] Apply the Two Secants Segments Theorem.

[Free Registration/Login may be required to access all resource tools.] Find a pyramid's volume and surface area.

[Free Registration/Login may be required to access all resource tools.] Find a sphere's volume and surface area.

Teachers can assess students knowledge of counting shapes with these printable worksheets.