Expression 5: "A" left parenthesis, "i" , "x" , "y" , right parenthesis equals StartFraction, "a" "x" plus "b" "y" plus "c" Over 2 , EndFraction with "a" equals negative "V" Subscript, "e" "r" "t" "e" "x" , Baseline left bracket, "i" , right bracket . "y" plus "V" Subscript, "e" "r" "t" "e" "x" , Baseline left bracket, left brace, "i" greater than 1 : "i" minus 1 , "n" Subscript, "u" "m" "V" "e" "r" "t" "e" "x" , Baseline , right brace , right bracket . "y" , "b" equals "V" Subscript, "e" "r" "t" "e" "x" , Baseline left bracket, "i" , right bracket . "x" minus "V" Subscript, "e" "r" "t" "e" "x" , Baseline left bracket, left brace, "i" greater than 1 : "i" minus 1 , "n" Subscript, "u" "m" "V" "e" "r" "t" "e" "x" , Baseline , right brace , right bracket . "x" , "c" equals "V" Subscript, "e" "r" "t" "e" "x" , Baseline left bracket, left brace, "i" greater than 1 : "i" minus 1 , "n" Subscript, "u" "m" "V" "e" "r" "t" "e" "x" , Baseline , right brace , right bracket . "x" "V" Subscript, "e" "r" "t" "e" "x" , Baseline left bracket, "i" , right bracket . "y" minus "V" Subscript, "e" "r" "t" "e" "x" , Baseline left bracket, left brace, "i" greater than 1 : "i" minus 1 , "n" Subscript, "u" "m" "V" "e" "r" "t" "e" "x" , Baseline , right brace , right bracket . "y" "V" Subscript, "e" "r" "t" "e" "x" , Baseline left bracket, "i" , right bracket . "x"Ai,x,y=ax+by+c2witha=−Vertexi.y+Vertexi>1:i−1,numVertex.y,b=Vertexi.x−Vertexi>1:i−1,numVertex.x,c=Vertexi>1:i−1,numVertex.xVertexi.y−Vertexi>1:i−1,numVertex.yVertexi.x
5
Expression 6: Start sum from "k" equals 1 to "n" Subscript, "u" "m" "V" "e" "r" "t" "e" "x" , Baseline , end sum, StartAbsoluteValue, "A" left parenthesis, "k" , "x" , "y" , right parenthesis , EndAbsoluteValue equals Start sum from "k" equals 1 to "n" Subscript, "u" "m" "V" "e" "r" "t" "e" "x" , Baseline , end sum, "A" left parenthesis, "k" , "x" , "y" , right parenthesisnumVertex∑k=1Ak,x,y=numVertex∑k=1Ak,x,y
