Sophia Learning
Sophia: In Group/out Group: Relationships and Attitudes: Lesson 2
At the end of this tutorial, the learner will understand ways in which group membership affects people's perceptions and actions towards their own and other groups. It is 2 of 3 in the series titled "In-Group/Out-Group: Relationships and...
Sophia Learning
Sophia: Scale Factor and Volume of Similar Figures: Lesson 2
This lesson will discuss the relationship between scale factor and volume of similar figures. It is 2 of 4 in the series titled "Scale Factor and Volume of Similar Figures."
Sophia Learning
Sophia: Why and How Do Humans Group?: Lesson 2
At the end of this tutorial, the learner will understand causes and dynamics of group formation. It is 2 of 3 in the series titled "Why and How do Humans Group?."
Other
National Council of Supervisors of Mathematics: Congruence and Similarity
National Council of Supervisors of Mathematics: Congruence and Similarity provides a teacher learning module, on how to effectively teach similarity and differences between congruence and similarity which is used to develop mathematical...
Other
National Council of Supervisors of Mathematics: Slope and Linear Functions
National Council of Supervisors of Mathematics: similarity, slope, and graphs of linear functions provides a teacher learning module, on how to effectively teach similarity, slope, and graphs to develop skill in reasoning about reasoning...
CK-12 Foundation
Ck 12: Geometry: Similarity
[Free Registration/Login may be required to access all resource tools.] Recognize similarity in figures
University of Cambridge
University of Cambridge: Maths and Sports: The Fastest Cyclist
As a coach for a long distance cyclist, can you come up with a race plan to help him win his ride from Lands End to John o' Groats? This activity is a more challenging follow-on from Nutrition and Cycling and is aimed at secondary...
Mangahigh
Mangahigh: Shape: Recognize Similar Shapes
Determine if objects are similar by looking at proportions and the shape.
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...
CK-12 Foundation
Ck 12: Geometry: Sas Similarity
[Free Registration/Login may be required to access all resource tools.] Use the SAS Similarity Theorem to determine if triangles are similar.
Varsity Tutors
Varsity Tutors: Hotmath: Graphing Calculator Practice Problems: Similarity and Proportion
Practice using your graphing calculator for similarity and proportion problems. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly under each problem.
CK-12 Foundation
Ck 12: Proportion Properties
[Free Registration/Login Required] Students will complete the interactice activity to explore proportions and solve the equation. Click learn more to watch a video and click challenge me to answer a practice question.
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...
Khan Academy
Khan Academy: Solve Triangles: Angle Bisector Theorem
Use the Angle Bisector Theorem to find missing side lengths in triangles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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.
Oswego City School District
Regents Exam Prep Center: Dilations
Oswego City School District provides a three link tutorial on dilations. By clicking on each of these links, you will find the definition of a dilation, examples of dilations, and a quiz to test your skills.
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...
Science Struck
Science Struck: How Do Optical Illusions Work?
Learn how the eyes play tricks on us when we look at optical illusions. This resource explains many of the techniques used to challenge our visual perception.
CK-12 Foundation
Ck 12: Geometry: Scale Factor of Similar Polygons
[Free Registration/Login may be required to access all resource tools.] Recognize the ratio of corresponding side lengths of similar figures as scale factor.
Texas Instruments
Texas Instruments: Proportional Flag
In this activity, students can use the concepts of similarity to create a scale drawing of the national flag, that is large enough to cover most of a football field.
Illustrative Mathematics
Illustrative Mathematics: G Gpe, G Co, G Srt Unit Squares and Triangles
In this task, students are shown three unit squares and two line segments connecting two pairs of vertices. They are asked to find the area of a triangle formed by intersecting lines. They can solve it using coordinate geometry or...
Illustrative Mathematics
Illustrative Mathematics: G C Similar Circles
In this task, students are asked to show that all circles are similar using two different methods, a visual one and an algebraic one. Includes a GeoGebra worksheet that can be used by the instructor to demonstrate the material. Aligns...
Illustrative Mathematics
Illustrative Mathematics: G Srt Pythagorean Theorem
The purpose of this task is to prove the Pythagorean Theorem using similar triangles. Aligns with G-SRT.B.4.
Illustrative Mathematics
Illustrative Mathematics: G Srt Folding a Square Into Thirds
The goal of this task is to apply knowledge about similar triangles in order to understand an origami construction: trisection of the side of a square. Aligns with G-SRT.B.5.