Expression 18: polygon left parenthesis, "P" , "P" plus "L" Subscript, "N" , Baseline , right parenthesis Has graph.polygonP,P+LN
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Dot product
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Expression 20: "d" Subscript, "o" "t" , Baseline left parenthesis, "m" , "n" , right parenthesis equals "m" . "x" times "n" . "x" plus "m" . "y" times "n" . "y"dotm,n=m.x·n.x+m.y·n.y
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Expression 21: "B" equals StartFraction, "d" Subscript, "o" "t" , Baseline left parenthesis, "L" Subscript, "N" , Baseline , "N" , right parenthesis Over "D" squared , EndFraction equals 0.0 2 4 3 9 0 3 8 4 2 1 3 2B=dotLN,ND2