Illuminations: Go With Green Rectangles

This Internet Mathematics Excursion is based on E-example 6.3 from the NCTM Principles and Standards for School Mathematics.

This is the second in a sequence of four lessons designed for students to understand ratio, proportion, scale factor, and similarity using perimeter and area of various rectangular shapes. Students manipulate 2-dimensional rectangles to focus on the relationship between the scale factor and ratio of perimeters of similar rectangles, and the relationship between scale factor and ratio of areas of similar rectangles.


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Illuminations (National Council of Teachers of Mathematics)

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