<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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They were blamed for spreading disease and slum housing, as well as rising crime rates, alcoholism and gambling
I can't help you with this unless you explain what you have to write about.
