Geometry Teacher Resources

Find Geometry educational ideas and activities

Showing 1 - 20 of 9,088 resources
Students investigate properties of special right triangles. In this geometry lesson, students use the Pythagorean Theorem to solve for missing angles and sides. They perform reflections.
Fifth graders explore geometric building blocks in the real world in order to describe the characteristics and relationships of points, lines, line segments, rays, and planes. This is the first lesson plan in a series of lessons in geometry.
Having a good working knowledge of math vocabulary is especially important for geometry learners. Here are 119 pages worth of wonderfully constructed definitions, constructions, formulas, properties, theorems, and postulates. This is a fantastic geometry resource that you can use throughout the school year.
  • Display cards and change them out as you progress through different topics
  • Use the cards as review throughout the year to remind students of past learning
  • Laminate the cards and allow students to sort them into topics they definitely understand, somewhat understand, and don't yet understand
Students identify geometric shapes. In this geometry lesson, students take a walk around the school to identify samples of geometry concepts that they see.
Tenth graders explore non-Euclidean geometry.  In this geometry lesson, 10th graders investigate “taxicab geometry.”  Students investigate the taxicab distance formula and make comparisons between a circle in Euclidean geometry and a circle in taxicab geometry. 
In this mathematics review worksheet, students solve fraction, probability, geometry, and mental math problems as they complete the 70 problems presented.
Students investigate the sphere and the postulate of Euclid. For this geometry lesson, students differentiate between euclidean geometry and non-euclidean geometry.
A home improvement plan can help adult learners preparation for the GED exam. They review vocabulary, prepare diagrams, complete a worksheet, calculate perimeters and analyze how to approach a story problem. They identify many geometry concepts used in solving GED problems.
Students play with origami. In this geometry skills lesson, students use Internet sources to explore origami. Students apply geometry skills to create origami figures.
Students examine shapes and sizes by viewing images in a slide-show. In this geometry identification lesson plan, students view a PowerPoint presentation with images of shapes the students identify and describe. Students discuss the differences between 2 dimensional and 3 dimensional shapes as well.
Eighth graders complete a unit of lessons on basic geometry concepts. They participate in a variety of activities, culminating in a project that involves publishing a booklet or a poster that presents the major geometry concepts from the unit.
Tenth graders analyze objects by name and sides. For this geometry lesson, 10th graders solve geometric equations using the sides and n-gons. They observe picture slides and draw conclusions.
The Common Core is intended to help all children meet high academic standards. Here is a Common Core designed lesson that is intended for learners with communication or language difficulties. The lesson is written in a narrative style and uses explicit instruction, precise language, and technology to facilitate basic geometry terms. Learners will be able to see, create, and discuss terms that will aid in building their mathematical vocabulary.
Tenth graders explore geometry with the TI-nspire.  In this geometry lesson plan, 10th graders investigate the menus and tools of the TI-nspire.  The lesson plan includes directions for basic constructions, storing and using measurements, and matrix operations. 
Learners investigate a variety of two-dimensional polygons which are divided and combined to determine various properties. The figures are compared, contrasted, and classified.
Use geometric principles to analyze North American quilt patterns. Learners review the concept of area, perimeter, and symmetry. They explore the importance of the star in quilting and conduct research on Morning Star quilts using the Internet. This instructional activity would be great for an Open House or Math night!
How can we identify shapes in the Universe? High schoolers will compare and contrast elliptic and hyperbolic geometry. They will also explore one possible way to measure the curvature of the Universe, namely, by measuring the sum of the angles in a triangle. Resource links are included.
Students explore geometry using a Rubik's Cube. In this 2-D and 3-D shapes lesson, students use the Rubik's Cube to find the center, edge and corner pieces. Students then find the dimensions of the Rubik's Cube and read the solution guide. After reading students demonstrate methods and algorithms.
Take geometry into the real world! You'll find just about everything you need for a fun group project reinforcing terms such as: quadrilateral, parallel lines, hexagon, circumference, vertex, acute angle, polygon, and many more. Of course, you can easily add to this 21-term list, which is included in two formats: with definitions and without. Introduce kids to shapes in the world using the attached slide show featuring architectural elements. What geometric concepts do they see? There is an interactive quiz as well as games to reinforce the terms. Then, groups take photographs around campus displaying as many of the words as possible. They create a slide show and present it to the class. If you don't have PhotoStory, PowerPoint will work just fine.
Tenth graders explore the basic functions of Cabri, Jr.  In this geometry instructional activity, 10th graders practice using the basic functions of the software, including use of the Pointer, Point, Line, Measure, and Construct toolbars.