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This What Lies Behind “Same Shape”? lesson plan also includes:
- What Lies Behind “Same Shape”? (Doc)
- What Lies Behind “Same Shape”? (PDF)
- What Lies Behind “Same Shape”? (Doc)
- Grade 8 Module 3: Teacher Materials
- Grade 8 Module 3: Student Materials
- Grade 8 Module 3: Copy Ready Materials
- Math Fluency Support for Grades 6-8
- Answer Key
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Develop a more precise definition of similar. The instructional activity begins with an informal definition of similar figures and develops the need to be more precise. The class learns about dilations and uses that knowledge to arrive at a mathematical definition of similar.
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CCSS:
Designed
Concepts
Additional Tags
Instructional Ideas
- Provide dilations of line segments and have the class draw them
- Make it clear that class members must use the ratio of the lengths to find the scale factor
Classroom Considerations
- The class should be familiar with the concept of congruence
- The resource is the first in a series of 16
Pros
- The answer keys use the notation from the lesson to create the equations
- The exit tickets assesses both the conceptual understanding the computation associated with dilations
Cons
- The resource does not contain an embedded movie as stated