Download these worksheets to sharpen your geometry skills. Sheets focus on angles, coordinate geometry, triangles, quadrilaterals, transformations, and three-dimensional geometry, and more.

Geometry is the study of how to use math to describe and investigate different points, lines and shapes. The way that a shape is described in geometry is with a formula, which is simply a mathematical way to calculate different...

This site is an archive of questions posed by students and the general public about geometry which are responded to by "Dr. Math."

The game of football provides numerous opportunities to see geometry at work. No matter what the form, geometry helps us understand specific experiences and it especially helps us define and enjoy the games we play.

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

See how geometry software expresses geometric shape reflections.

See how geometry software performs geometric translations.

A complete high school Geometry course that includes interactives in every lesson and videos in some. Adaptive Practice questions ensure the material is understood before moving on to build on it. Every lesson also has specifically...

[Free Registration/Login may be required to access all resource tools.] Reasoning is a fundamental part of geometric proofs. There are several types of reasoning, many of which we innately and naturally picked up. However, the different...

Students make connections between the coordinate grid and Geometry by finding the distance of line segments using the coordinate plane. This instructional activity includes a detailed lesson plan, slides containing notes and problems,...

If you want to plant a class garden, this is a great resource for combining geometry, Native American studies, and rocks.

The Shodor Education Foundation provides this lesson plan to give students an opportunity to connect probabilty and geometry. Students learn how to calculate probability, use geometry to solve probabilty problems, and, as an added bonus,...

During this lesson students explore the world of geometry on the Internet. Students create their own list of terms by navigating geometry sites. Students also reinforce what they have learned using interactive Internet sites.

This lesson focuses on a different way to construct geometric figures without tools, Origami. The goal is to make objects out of one or more sheets of paper, without any additional tools like glue or scissors. You can create incredibly...

Juice boxes are so convenient, just poke the straw in and sip away. It might surprise you how much thought goes into the design and manufacturing of a juice box. Each manufacturer has carefully calculated how big each side should be to...

Review geometry math vocabulary terms with this online game.

This lesson focuses on polygons; a polygon is a closed, flat shape that has only straight sides. Polygons can have any number of sides and angles, but the sides cannot be curved.

Here is a project that combines Computer Science and Mathematics. Prove a method for inscribing a circle within a triangle (as shown). You'll also learn how to create an interactive diagram to illustrate your proof, using an applet that...

This lesson plan reviews transformations in the coordinate plane while mimicking real-world planning skills. It gives an assessment and ideas for remediation, extention as well as ways to manage behavior problems and reluctant learners.

The geometry tutorial investigates word problems on squares with detailed solutions. Topics included are perimeter and area of a square.

A unique geometry project that asks students to complete a transformation using a picture. Project includes instructions, examples, and quiz questions.

This lesson focuses on the history of geometric construction beginning with Euclid's Axioms to the simple tools such as the straight edge and the compass.

Models how to write a similarity statement about different types of triangles and quadrilaterals.

Mathematicians in ancient Greece were amazed by mathematical patterns, and wanted to explore and explain them. They began to study mathematics just "for fun" without a specific application in mind. One of these mathematicians, Thales of...