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.
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."
National Council of Teachers of Mathematics
Nctm: Illuminations: Scale Factor
Use this applet to investigate how changes in the scale factor influence the ratio of perimeters and the ratio of areas between two figures.
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.
Khan Academy
Khan Academy: Dilations: Scale Factor
Find both the center and the scale factor of a dilation that maps a given figure to another one. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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 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 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."
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.
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."
CK-12 Foundation
Ck 12: Geometry: Polygon Similarity Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide looks at similar polygons, scale factor (ratio), and triangle similarity.
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.
ClassFlow
Class Flow: Similar Figures
[Free Registration/Login Required] This flipchart is designed to introduce proportional relationships between similar figures. It also introduces the concept of scale factor.
Mangahigh
Mangahigh: Shape: Length, Area and Volume Scale Factors
Explore the relationships between area and volume based upon length.
Government of Alberta
Learn Alberta: Math Interactives: Exploring Dilations
Investigate dilations using this interactive resource. Students are given an opportunity to explore how scale factors can be used to enlarge or reduce the size of a given figure. Be sure to follow the link to the printable activities,...
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...
CK-12 Foundation
Ck 12: Geometry: Dilation in the Coordinate Plane
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to draw dilated figures in the coordinate plane and use dilated figures in the coordinate plane to find scale factors. Students...
CK-12 Foundation
Ck 12: Similar Polygons and Scale Factor
[Free Registration/Login Required] Students will follow the given steps to solve the given equation. Click learn more to watch a video and click challenge me to answer a practice question.
CK-12 Foundation
Ck 12: Geometry: Dilation
[Free Registration/Login may be required to access all resource tools.] In this lesson students recognize dilations and use scale factor to determine measurements. Students examine guided notes, review guided practice, watch...
CK-12 Foundation
Ck 12: Geometry: Dilation
[Free Registration/Login may be required to access all resource tools.] This concept introduces dilations and how to find scale factors. Students examine guided notes, review guided practice, watch instructional videos and attempt...
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...
Alabama Learning Exchange
Alex: "Movin' on Up"
Students will use their knowledge of scale factor to enlarge a picture to scale. They will then use PhotoStory to create a collage of their pictures. This lesson plan was created as a result of the Girls Engaged in Math and Science...
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."