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Reference.org
Polygonal chain
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<p>In <a href="/facts/Geometry/wTQf5ffQ">geometry</a>, a polygonal chain is a connected series of <a href="/facts/Line_segment/V8E0M4qk">line segments</a>. More formally, a polygonal chain P {\displaystyle P} is a <a href="/facts/Curve/xBQ0pTBW">curve</a> specified by a <a href="/facts/Sequence/gV2S4uqp">sequence</a> of points ( A 1 , A 2 , … , A n ) {\displaystyle (A_{1},A_{2},\dots ,A_{n})} called its <a href="/facts/Vertex_(geometry)/ID3cea9z">vertices</a>. The curve itself consists of the line segments connecting the consecutive vertices. </p>