Charleston School District
Constructing Dilations
Pupils multiply the vertical and horizontal distances from the center of dilation by the scale factor. The independent practice prompts the class to analyze the relationship between the image and pre-image. The lesson is...
Student Handouts
What's My GPA?
Here is an excellent, detailed one-page reference sheet to introduce students to what a grade point average (GPA) is and how to calculate their own.
Charleston School District
Identifying Series and Determining Congruence or Similarity
Learners consider a set of questions to determine a series of transformations that will move one figure to another. Once the series is determined, the pupil then determines whether the pre-image and image are either congruent...
It's About Time
Volcanic Hazards: Airborne Debris
Pupils interpret maps and graph data related to volcanic ash. Then they analyze the importance of wind speed and the dangers of the ash to both life, air temperature, and technology.
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]
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.
Oswego City School District
Regents Exam Prep Center: An Intuitive Notion of Dilation
This site offers a very basic discussion of dilations. It explains what a scaling factor is and provides illustrations.
Other
Stat Soft: Statistics Glossary
Dozens of statistical terms are defined and illustrated in this glossary.
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.
Science Struck
Science Struck: Similarity Statement in Geometry With Examples
Models how to write a similarity statement about different types of triangles and quadrilaterals.
University of Georgia
University of Georgia: Inter Math: Dilation
This site defines dilation and gives an example with a diagram. There is also an interactive activity involving a JavaSketchPad page in which you can explore dilations. In addition, be sure to follow the links to related terms, more...
Geometry Help
Geometry Help: Similar Triangles
Explains the basic concept of similar triangles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
Quia
Ixl Learning: Dilations
Brush up on your math skills relating to dilations then try some practice problems to test your understanding.
Quia
Ixl Learning: Similar Triangles
Brush up on your math skills relating to similar triangles then try some practice problems to test your understanding.
Quia
Ixl Learning: Similarity
Brush up on your math skills relating to similarity then try some practice problems to test your understanding.
National High Magnetic Field Laboratory
Magnet Academy: James Watt
The Scottish instrument maker and inventor James Watt had a tremendous impact on the shape of modern society. His improvements to the steam engine were a significant factor in the Industrial Revolution, and when the Watt engine was...
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