Illustrative Mathematics
What is a Trapezoid? (Part 2)
This collaborative activity investigates the meaning of a trapezoid and a parallelogram. It begins by presenting two different definitions of a trapezoid. Learners are to reason abstractly the difference between the two definitions and...
Curated OER
Measurement
Seventh graders measure surface area. In this geometry lesson, 7th graders find the surface area of various geometrical shapes. Using a computer program, students compute the area of 2-D and 3-D shapes. Students use...
Curated OER
Shapes and Angles
Are your geometry whizzes learning about angles and shapes? This online worksheet gives 10 multiple choice questions based on images and word problems. Concepts include deducting angle degree, classifying shapes, and identifying angle...
Exploratorium
Exploring a Complex Space-Filling Shape
Middle schoolers build a three-dimensional 12-pointed star as a geometric exercise. The shape is quite-difficult to construct. Luckily there is an excellent template that learners cut out, then use to make their pyramid. The second part...
Alabama Learning Exchange
Polygons-Changing Area Versus Changing Perimeter
Investigate the area and perimeter of polygons in this geometry lesson. Young geometers use grid paper to draw a quadrilateral and calculate its area and perimeter. They also read The Greedy Triangle to identify the changing shape of...
Curated OER
Similar Shapes
In geometry, similar and congruent shapes are often confused. Shapes that are similar are the same shape, but a different size. This activity gives young learners some practice in identifying similar shapes. There are five polygons...
Kuta Software
Reflections of Shapes
In this reflection of shapes learning exercise, learners graph images on a coordinate plane. They reflect the image and sketch it on the graph. They write a rule to describe the transformation. This four-page learning exercise contains...
Denton Independent School District
Pieces to the Puzzle Fraction Project
Four polygons each have a fraction with unlike denominators printed on them. Creative math minds select several shapes to create a design with and then write and solve a math problem involving the addition of all of the fractions...
Curated OER
Poly-Mania
This hands-on activity takes young geometers on a tour of 2D polygons and 3D polyhedrons. After exploring different web resources and discussing geometric shapes, small groups construct models of polyhedrons using bendable straws. Note:...
Illustrative Mathematics
Finding Areas of Polygons, Variation 1
An exercise in finding the area of polygons by decomposing into triangles and composing into rectangles is the focus of this resource. Make several copies of the worksheet for each participant. Ask learners to use colored pencils to...
Curated OER
Building Big and Strong
Middle and high schoolers explore the concepts of architectural rigidity. They analyze a variety of polygons, and explain why some shapes add more strength to structures than others. The PBS video, "Building Big," is utilized in this plan.
Arizona Department of Education
Area and Perimeter of Regular and Irregular Polygons
Extend young mathematicians' understanding of area with a geometry lesson on trapezoids. Building on their prior knowledge of rectangles and triangles, students learn how to calculate the area of trapezoids and other...
Noyce Foundation
Lyle's Triangles
Try five problems on triangles. Levels A and B focus on shapes that can be created from right triangles. Level C touches upon the relationship between the area of a six-pointed star and the area of each triangle of which it is composed....
K-5 Math Teaching Resources
Polygon Sort Sheet
What makes a polygon a polygon and how many different types are there? Invite your scholars to learn and discuss that question with this polygon sort sheet. Learners cut out each polygon and sort them by their different...
Curated OER
The Allied Victory
Key events that shaped the outcome of WWII are outlined in this well put together presentation. Easy to follow and set up in chronological order, Tenth graders will learn about the North African Campaign, Battle for Stalingrad, Invasion...
Curated OER
Circles to Spheres
Students investigate circles and spheres. In this space shapes lesson, students compare and contrast two-dimensional and three-dimensional shapes. Students investigate the relationship between plane and space shapes.
Curated OER
Fun with Word Shapes
In this word shapes activity, students put words into the word shapes above and below the center line. Students put 16 words into the word shapes on 6 pages.
Curated OER
Fun with Word Shapes
In this word shapes worksheet, learners put words into the word shapes above and below the center line. Students put 16 words into the word shapes on 3 pages.
Curated OER
Fun with Word Shapes
In this word shapes worksheet, students put words into the word shapes above and below the center line. Students put 16 words into the word shapes on 3 pages.
Curated OER
Shapes Word Search
In this shapes word search activity, students use their problem solving skills to unscramble 10 words and then locate and identify them in the word puzzle.
Curated OER
Learning Colors and Shapes
In this colors and shapes activity, students follow the directions to color each of the six shapes in a design the correct color.
Curated OER
Fun with Word Shapes
In this word shapes worksheet, learners put words into the word shapes above and below the center line. Students put 16 words into the word shapes on 3 pages.
Curated OER
Shapes
Discuss the properties of 2D and 3D shapes in order to help learners understand the concept. Learners will participate in an interactive whiteboard lesson to develop understanding of 2D and 3D shapes.
Curated OER
Fun with Word Shapes
In this word shapes worksheet, students plug the words into the word shapes that fit above and below the center line. Students complete 3 pages with 16 words each.
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