Exploring the Effect of Changing Dimensions on Area & Perimeter

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Presentation transcript:

Exploring the Effect of Changing Dimensions on Area & Perimeter Graph the quadrilateral with vertices at A(-3, 2), B(1, 2), C(1, -1) and D(-3, -1). Area = _____________ Perimeter = _________

Transformation #1 (x, y)  (3x, y) Apply the transformation to ABCD and find the new area and perimeter: Area = _____________ Perimeter = _________ A B D C

Transformation #2 (x, y)  (x, 3y) Apply the transformation to ABCD and find the new area and perimeter: Area = _____________ Perimeter = _________ A B D C

Transformation #3 (x, y)  (3x, 3y) Apply the transformation to ABCD and find the new area and perimeter: Area = _____________ Perimeter = _________ A B D C

How did the perimeter & area change? When just one dimension changes by factor of 3: Perimeter: __________________________ (New Area) = (Original area) x (____) When both dimensions change by factor of 3: (New Perimeter) = (Original perimeter) x (____)

In your groups, work your way through 20.1 Try these problems pg. 1038: Example 1 A (read) and B (do) pg. 1039: Your turn #5 ( ) Example 2 A (read) and B (do) Reflect #6

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