Does doubling mean everything doubles? Learners adjust the scale factor between two rectangles. Using the calculated measurements, pupils investigate the ratios between the lengths, perimeters, and areas of the rectangles.

Concepts

scale factors, perimeter, perimeter of rectangles, area, area of rectangles, ratios

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Additional Tags

math

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Instructional Ideas

• Have class members calculate the ratios of the perimeters and areas

Classroom Considerations

• Be aware the ratio of figures is not the same for the side lengths and the perimeter and area
• The measurements are to the nearest hundredth so there are some rounding errors

Pros

• Contains a link to a lesson that uses the resource
• Calculates lengths and areas in a universal measurement that does not depend on screen size

Cons

• None

Common Core

7.G.A.1 MP6 MP7