Curated OER
Leveled Problem Solving Using Proportions with Similar Polygons
In this proportions and similar polygons activity, students solve the problems that use proportions, rations, fractions, and similar polygons.
Curated OER
Same Worksheet
This basic shapes worksheet has students look at the shapes in 3 rows, and circle the shape that is the same as the first shape in each row. Very basic shape recognition.
Curated OER
II Similar
Students, through lecture and guided practice, discover the properties of similar triangles. They use given measurements of one triangle to find a missing measurement of a similar triangle. They apply this knowledge in real-life...
Curated OER
THE MEAN INDEX CARD
Students cut an index card to create three similar right triangles and explore the congruencies and proportions that exist. They investigate the properties of lines and concepts of congruency, similarity, tangency and symmetry of...
Curated OER
Simply Similar at Sea: Simple Triangles
Tenth graders answer a variety of problems based on similar triangle and learn about the rule of thumb. They will test the rule of thumb by estimating the distance to an object in the classroom.
Curated OER
Similar or Not?
Fifth graders define the meaning of similar and congruent using concrete objects. They make similar and congruent figures using geoboards. They draw their figures on dot paper, and color their designs.
Government of Alberta
Learn Alberta: Math Interactives: Exploring Similarity and Congruence
This multimedia Learn Alberta math resource looks at how the math concepts of similarity and congruence are utilized in the making of road signs. The accompanying interactive component asks students to manipulate triangles by dragging,...
Other
City Journal: Let's Break Up the Big Cities
This lengthy article offers many examples in its claim that smaller municipalities do a better job of governing and providing services than huge megacities.
McGraw Hill
Mc Graw Hill: Glencoe: Self Check Quizzes: Congruent and Similar Figures
Use Glencoe's randomly generated self-checking quiz to test your knowledge of congruent and similar figures. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check...
Oswego City School District
Regents Exam Prep Center: Similarity of Triangles
Discover the world of "similarity" in this test prep tutorial on similar triangles. Detailed explanation of concept with examples, challenging interactive practice, and a classroom activity that integrates math and science.
National Council of Teachers of Mathematics
Nctm: Figure This: Math Challenges for Families
Students, teachers, and parents alike will enjoy this challenging math site. It contains a clever brain teaser section plus creative problems related to algebra, geometry, measurement, numbers, statistics, and probability. A Spanish...
CK-12 Foundation
Ck 12: Interactive Middle School Math 8 for Ccss
A complete CCSS Grade 8 Mathematics course that includes interactives in every lesson, plus videos, hands-on activities, and questions with immediate feedback. Every lesson also has specifically chosen 'Related Modalities' that teach the...
Cuemath
Cuemath: What Is Similarity?
This mini-lesson introduces the properties of similarity and its role in geometry.
Shodor Education Foundation
Shodor Interactivate: Lesson: Translations, Reflections, and Rotations
This upper elementary and middle school lesson plan introduces a variety of motion geometry concepts such as translations, reflections, and rotations. Lots of interactive support for learners.
Texas Instruments
Texas Instruments: Similar Figures
In this activity, students investigate the properties of similar triangles.
Texas Instruments
Texas Instruments: Real Life, Real World Activity Architecture
Architects and Interior Designers use scale drawings that represent the house or room they are designing. This activity uses Cabri Jr. Geometry software to create a scale drawing with dilations.
Texas Instruments
Texas Instruments: Similarity and Dilations
Students will discover properties of similar figures using the TI-89 and CABRI Geometry II to use dilations to dynamically manipulate figures.
Texas Instruments
Texas Instruments: Using Cabri Geometry to Create Fractals
With Cabri Geometry Jr. you never need to leave your classroom! The use of fractals can help understand the concepts of fractals and prepare for the HSPA. There are 2 separate activities to do in the classroom with the answers.
Texas Instruments
Texas Instruments: Math Today Wing Tabs Save Fuel
Using the USA TODAY Infograph, 'Wing tabs save fuel', ratios and proportions will be used to explore the concept of similarity between a drawing/model and the actual dimensions. The effects of dilation (size change) on an image and...
Texas Instruments
Texas Instruments: Real Life Real World Activity Forestry
Forest industry professionals make measurements in their work using tools including the Clinometer and the Biltmore Stick. These tools are based on the concepts of similar triangles and trigonometric ratios in a right triangle. This...
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Similarity
This site contains a lesson plan for high school age students. The objective is to discover the factor of proportionality in similar polygons and to relate this factor to the perimeters and areas of similar polygons.
Math Open Reference
Math Open Reference: Similar Polygons and Triangles
A complete reference guide to similar triangles and polygons. It provides definitions and interactive activities that enhance further explanation.
Antonio Salinas and Maria Jesus Egea
Vedoque: Atento
This interactive game is designed to teach students to identify similarities and differences among objects.
McGraw Hill
Glencoe Mathematics: Online Study Tools: Quiz on Proportions & Similarity
The online assessment displays knowledge of concepts used in Geometry. The multiple choice questions test learners on proportions and similarity.