The main formula is A= 2pi r (H + r) H= 9, and r= 11 so A= 2 *3.14*11* (9 + 11) = 1381.6 cm² so the answer is  1380 cm2
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a line is an defined derm because it
a)contains an infinite number of points b) can be used to create other geometric shapes c)describes something that does not have width or depth d) is a term that does not have a formal definition. a line is an undefined term because it: contains an infinite number of points.
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Ask google i believe they can you with that question
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