Stretching and Shrinking
Unit 2:
Click on me for the link to the workbook
In this Unit, students will find relationships among figures that have been stretched or shrunk. They will analyze the resulting changes in properties of the figures, such as area and perimeter. Similarity will also be used to find the heights of real objects (such as buildings and flagpoles).
The problems students will work on are designed to help students begin to reason proportionally. By the end of this Unit, students will be able to:
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Create similar figures;
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Determine whether or not two figures are similar;
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Predict the ratios of the lengths and areas of two similar figures.
Vocabulary :
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adjacent sides
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corresponding angles
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corresponding sides
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equivalent ratios
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image
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midpoint
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nested triangles
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proportion
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ratio
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rep‑tile
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scale drawing
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scale factor
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similar
