Geometry: An Interactive Journey to Mastery

Lesson 24: Introduction to Scale

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with ease by multiplying values by k^2 or k^3 , respectively.

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x If you slice a cone at half its height, then, despite intuition, the volume of the top portion of the cone is

just^18 the volume of the original cone.

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k 2 , and the volume changes by a factor of k^3 81 .௘ͽ

 A rectangle has area 6 inches squared. What scale factor on a photocopy machine would yield a scaled copy

of that rectangle with area

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 A model airplane has scale 1:200.

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paint the plane?

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Problems