Curated OER
Geometry Scavenger Hunt
Students use the digital camera, identify geometric shapes (in nature as well as man-made), and gain a better understanding of geometric vocabulary. They search for and recognize geometric shapes in unusual settings
Curated OER
Geo-Folder
Second graders create a Geo-Folder based on geometric terms and concepts. They make a Table of Contents that guides them through the process of assembling a folder of completed activities.
Pennsylvania Department of Education
Creating Polygons
Students describe, make and compare polygons. In this creating polygons lesson, students identify properties of quadrilaterals and describe common features of two dimensional shapes.
CK-12 Foundation
Ck 12: Geometry: Corresponding Parts of Congruent Figures
[Free Registration/Login may be required to access all resource tools.] In this lesson, students identify corresponding parts of congruent figures. They examine guided notes, review guided practice, watch instructional videos, and...
Scholastic
Scholastic: Study Jams! Math: Geometry: Congruent Figures
Explore step by step how to determine if figures are congruent?
Mangahigh
Mangahigh: Shape: Recognize Congruent Shapes
Determine whether shapes are congruent or similar.
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...
CK-12 Foundation
Ck 12: Geometry: Similarity
[Free Registration/Login may be required to access all resource tools.] Recognize similarity in figures
Texas Education Agency
Texas Gateway: Generalizing Geometric Properties of Ratios in Similar Figures
Students will investigate patterns to make conjectures about geometric relationships and apply the definition of similarity, in terms of a dilation, to identify similar figures and their proportional sides and congruent corresponding...
Quia
Ixl Learning: Similarity
Brush up on your math skills relating to similarity then try some practice problems to test your understanding.
National Council of Teachers of Mathematics
The Math Forum: Similarity and Congruence
This site from Dr. Math at the Math Forum provides a collection of problems and exercises that require knowledge of the relations between similar or congruent shapes. Solutions are provided.
Khan Academy
Khan Academy: Similarity and Transformations
Given two polygons, try to map one onto the other using angle-preserving transformations, and determine whether they are similar. Transformations are done in "intuitive mode." Students receive immediate feedback and have the opportunity...
CK-12 Foundation
Ck 12: Geometry: Corresponding Parts of Similar Figures
[Free Registration/Login may be required to access all resource tools.] In this lesson, students identify corresponding parts of similar figures. Students examine guided notes, review guided practice, watch instructional videos and...
Varsity Tutors
Varsity Tutors: Hotmath: Similar Figures
Find a clear explanation of similar figures. Discusses how they can be transformed through a sequence of rotations, reflections, translations, and dilations. Explanations are supported with illustrated examples.
Khan Academy
Khan Academy: Practice: Determine Similar Triangles: Sss
In this set of questions, students practice identifying side-side-side similarity among triangles. Includes hints.
Sophia Learning
Sophia: Similarity
This learning tutorial describes the characteristics of similar figures and how to use scale factor and proportions to determine missing side lengths. The lesson includes PowerPoint presentations and videos demonstrating how to solve...
Science Struck
Science Struck: Similarity Statement in Geometry With Examples
Models how to write a similarity statement about different types of triangles and quadrilaterals.
Alabama Learning Exchange
Alex: Congruent and Similar Figures
Lesson plan where students learn about congruent and similar figures by viewing models and by using geoboards, pattern blocks, and the Internet. (Note: Lesson cited in the procedures cannot be found at the link provided.)
Texas Instruments
Texas Instruments: Similar Figures Discovery Activity
Students can use Cabri Jr. to discover two properties of similar triangles: corresponding angles are congruent and corresponding sides are proportional.
The Math League
The Math League: Similar Figures
This tutorial explains what similar figures are in geometry and provides examples.
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: Geometry: Similar Polygons and Scale Factors
[Free Registration/Login may be required to access all resource tools.] This concept teaches students what similar polygons are and how to use scale factors to solve for missing information in similar polygons.
CK-12 Foundation
Ck 12: Geometry: Similar Polygons and Scale Factors
[Free Registration/Login may be required to access all resource tools.] Apply the properties of similar polygons.
Khan Academy
Khan Academy: Congruence and Transformations
Given a pair of figures in the coordinate plane, try to map one onto the other and determine whether they are congruent. Includes examples of glide reflections. Students receive immediate feedback and have the opportunity to try...
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