Quia
Ixl Learning: Similarity
Brush up on your math skills relating to similarity then try some practice problems to test your understanding.
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Similarity
A guide to support parents as they work with their students in similarity.
Other
Nearpod: Congruent Triangles & Similarity
In this lesson on congruent triangles, students explore how to use postulates to identify if triangles are congruent by SSS, SAS, ASA, and AAS.
Sophia Learning
Sophia: Sas Triangle Similarity: Lesson 3
This lesson will provide examples that demonstrate how two triangles would be similar by SAS triangle similarity. It is 3 of 5 in the series titled "SAS Triangle Similarity."
Sophia Learning
Sophia: Scale Factor and Area of Similar Figures: Lesson 1
This lesson will discuss the relationship between scale factor and area of similar figures. It is 1 of 5 in the series titled "Scale Factor and Area of Similar Figures."
Sophia Learning
Sophia: Scale Factor and Surface Area of Similar Figures: Lesson 3
This lesson will discuss the relationship between scale factor and surface area of similar figures. It is 3 of 4 in the series titled "Scale Factor and Surface Area of Similar Figures."
Sophia Learning
Sophia: Scale Factor and Surface Area of Similar Figures: Lesson 1
This lesson will discuss the relationship between scale factor and surface area of similar figures. It is 1 of 4 in the series titled "Scale Factor and Surface Area of Similar Figures."
Sophia Learning
Sophia: Scale Factor and Volume of Similar Figures: Lesson 4
This lesson will discuss the relationship between scale factor and volume of similar figures. It is 4 of 4 in the series titled "Scale Factor and Volume of Similar Figures."
Sophia Learning
Sophia: Scale Factors: Lesson 2
This lesson defines the phrase scale factor. It is 2 of 5 in the series titled "Scale Factors."
Sophia Learning
Sophia: Similar Polygons and Their Perimeters: Lesson 5
This lesson presents the relationship between similar polygons and the ratio of their perimeters. It is 5 of 5 in the series titled "Similar Polygons and their Perimeters."
Sophia Learning
Sophia: Using Similarity to Identify Missing Information: Lesson 3
This lesson demonstrates how to use similar figures to find some unknown information about similar figures. It is 3 of 5 in the series titled "Using Similarity to Identify Missing Information."
Sophia Learning
Sophia: Using Similarity to Identify Missing Information: Lesson 5
This lesson demonstrates how to use similar figures to find some unknown information about similar figures. It is 5 of 5 in the series titled "Using Similarity to Identify Missing Information."
Sophia Learning
Sophia: Scale Factor and Area of Similar Figures: Lesson 3
This lesson will discuss the relationship between scale factor and area of similar figures. It is 3 of 5 in the series titled "Scale Factor and Area of Similar Figures."
Sophia Learning
Sophia: Similar Polygons and Their Perimeters: Lesson 1
This lesson presents the relationship between similar polygons and the ratio of their perimeters. It is 1 of 5 in the series titled "Similar Polygons and their Perimeters."
ClassFlow
Class Flow: Proportions and Similarity
[Free Registration/Login Required] Flipchart walks through the lesson on Proportions and similarity, as well as some of the theorems that support the concept.
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.
Wolfram Research
Wolfram Math World: Math World: Geometric Similarity: Similar
A definition for similar figures, directly similar, and inversely similar figures in Mathematics. Provides pictures to aid understanding.
Wolfram Research
Wolfram Math World: Geometric and Direct Similarity
This site contains a definition of the concept "directly similar." There are links to other defintions on this page. Great for reference.
Palomar Community College District
Palomar College: Two Dimensional Design Notes: Similarity and Proximity
College-level instructor's notes on two key principles of design: similarity and proximity. Collage project how-tos also provided.
Other
Blue Moon Original Oil Paintings: The Principle of Unity
Illustrated essay on the principle of unity, also known as harmony, explains how the grouping techniques of alignment, proximity, similarity, and continuity can be used to create a unified, harmonious composition.
SMART Technologies
Smart: Same Different Shape Color Matching
Students will identify similarities and differences using colors and shapes in this whiteboard lesson provided by SMART.
Math Open Reference
Math Open Reference: The Golden Rectangle
Gain an understanding of the golden rectangle with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.