This figure is a tetrahedron. What is the area of its base?
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4 is the x1 value, -8 is the y2 value, 8 is the x2 value, and 5 is the y2 value.
4 is the x1 value, -8 is the y2 value, 8 is the x2 value, and 5 is the y2 value.