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Earn +20 ptsQ: What factor does its surface area change?
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If the surface area of a sphere is increased by a factor of 4 what is the change in the length of the radius of the sphere?
The area of a sphere is A=4*3.14 * r^2. Thus the area varies as the square of the radius. If the surface area is increased by a factor of 4, then the radius will have to increase by the square root of 4 which is 2.
What happens to the Surface Area and Volume of a pyramid if the radius and height are divided by 2?
The surface area is reduced by a factor 4, the volume by a factor 8.
What happens to surface area when dimensions are changed by a scale factor?
The area changes by the square of the same factor.
How does the surface area of a cube change if the length of each side is doubled?
The surface area is quadrupled.
How do you determine surface area of similar objects when it has a scale factor of 2?
For areas: Square the Scale Factor.
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