นิพจน์ 9: "M" Subscript, "a" , Baseline equals 1 half left parenthesis, "A" plus "B" , right parenthesisMa=12A+B
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นิพจน์ 10: "M" Subscript, "b" , Baseline equals 1 half left parenthesis, "B" plus "C" , right parenthesisMb=12B+C
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นิพจน์ 11: "M" Subscript, "c" , Baseline equals 1 half left parenthesis, "C" plus "D" , right parenthesisMc=12C+D
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นิพจน์ 12: "M" Subscript, "d" , Baseline equals 1 half left parenthesis, "D" plus "A" , right parenthesisMd=12D+A
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นิพจน์ 13: polygon left parenthesis, "A" , "B" , "C" , "D" , right parenthesispolygonA,B,C,D
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นิพจน์ 14: "d" Subscript, "o" "t" 2 , Baseline left parenthesis, left parenthesis, "x" , "y" , right parenthesis minus "M" , right parenthesis equals "d" Subscript, "o" "t" 2 , Baseline left parenthesis, "M" Subscript, "a" , Baseline minus "M" , right parenthesisdot2x,y−M=dot2Ma−M
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นิพจน์ 15: "A" left parenthesis, 1 minus "t" , right parenthesis plus "C" "t"A1−t+Ct
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นิพจน์ 16: "B" left parenthesis, 1 minus "t" , right parenthesis plus "D" "t"B1−t+Dt
