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Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .
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Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.
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Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota
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Find the largest integer that is below Square root 10...
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