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OpenStudy (anonymous):
Find the area of a triangle with vertices at D(2, 0), E(–1, 0), and F(2, –7).
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OpenStudy (anonymous):
OpenStudy (callisto):
base = DE = 2-(-1) = 3 Height = 0-(-7) = 7 area = 3x7x1/2 = 10.5
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