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.
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.
National Council of Teachers of Mathematics
Nctm: Illuminations: Scale Factor
The interactive applet allows learners to explore the relationships between side length, area, and perimeter. Students see how changes in the scale factor influence the ratio of areas and perimeters. [Requires Java.]
Other
I Coach Math: Scale Factor
Explains what a scale factor is and scenarios where it is used. Presents an example problem and its solution, and includes a video. [9:36]
Sophia Learning
Sophia: Finding Scale Factors: Lesson 2
This lesson demonstrates how to find the scale factor. It is 2 of 5 in the series titled "Finding Scale Factors."
PBS
Pbs Learning Media: Kid Vid: Scaling Up Rectangles
Watch a student think through a problem about how the area of a rectangle changes when both sides are increased by the same scale factor and use online tools to demonstrate understanding of concepts related to area and scale factors in...
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: 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.
CK-12 Foundation
Ck 12: Arithmetic: Proportions to Find Scale Ratios
[Free Registration/Login may be required to access all resource tools.] In this lesson students find a scale, ratio, or proportion given actual and scale dimensions. Students examine guided notes, review guided practice, watch...
Better Lesson
Better Lesson: Scale Drawings
This lesson will provide students the opportunity to work with scale drawings as they create their own road trip to see how far they go using a map of the United States.
Alabama Learning Exchange
Alex: Using Scale Factors: Drawing Your Body to Scale
Teachers will use this lesson to review and apply skills involving scale factors. Teachers will use illuminations website to review scale factor. Then students will be given instructions to draw their bodies to scale.
PBS
Pbs: Scale City: Scaling Up Rectangles in the Real World
In this video, students explore Depression-era post office murals and modern outdoor murals to learn how artists use proportional reasoning and measurement to create large-scale paintings. The video ends with the question, "How do...
Khan Academy
Khan Academy: Constructing Scale Drawings
An urban planner needs your help in creating a scale drawing. Let's use our knowledge about scale factor, length, and area to assist. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
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,...
E-learning for Kids
E Learning for Kids: Math: Dance Performance: Position on a Map
This interactive website allows students to practice their map skills including scale factors on a map.
CK-12 Foundation
Ck 12: Geometry: Estimation of Parallelogram Area in Scale Drawings
[Free Registration/Login may be required to access all resource tools.] In this lesson students estimate actual areas of parallelograms in scale drawings. Students examine guided notes, review guided practice, watch instructional videos...
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.
PBS
Pbs Learning Media: Scaling Up Photographs
In this Cyberchase video segment, Bianca volunteers to take over an important job at a copy shop. She must make a life-size copy of a photo of the King of Sloovoonia.
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