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OpenStudy (anonymous):
Calculate the area of triangle ABC with altitude CD, given A (-7, -1), B (-1, 5), C (0, 0), and D (-3, 3). 9 square units 18 square units 18.5 square units 21 square units
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OpenStudy (issy14):
Have you tried graphing the triangle? counting the units and utilizing the are formula for a triangle?
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