Surface area is an assignment of a positivereal number to a certain class of surfaces that satisfies several natural requirements. The most fundamental property of the surface area is its additivity: the area of the whole is the sum of the areas of the parts.
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Surface area of a sphere = 4πr2
145
153.9 units squared.
How do you find the suface area of a net? Answer: Do the formula for each shape that is in the net.
Multiply the length of any side by the same number.