<span>Trigonometry (from Greek trigōnon, "triangle" and metron, "measure") is a branch of mathematics that studies relationships involving lengths and angles of triangles. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies
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I believe it would be answer C
Federal troops removed and racist pracices eliminated in the south
Illinois and Wisconsin because Dr. Emerson had brought Dred Scott there.