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Mathematics 21 Online
jabez177 (jabez177):

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jabez177 (jabez177):

C ?

OpenStudy (anonymous):

find the areas of trapezoids A=Height*(base1-base2)/2

OpenStudy (anonymous):

sorry, I just noticed one thing 21*13 - (13-9)*21/2 that's how it will be calculated

OpenStudy (anonymous):

yes C

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