Expression 19: polygon left parenthesis, "A" , "B" , "C" , right parenthesis Has graph.polygonA,B,C
19
Expression 20: "r" left parenthesis, "x" , "y" , right parenthesis equals 2 StartFraction, "m" "x" plus "c" minus "y" Over "m" squared plus 1 , EndFractionrx,y=2mx+c−ym2+1
Expression 29: polygon left parenthesis, left parenthesis, "x" Subscript, 6 , Baseline , "y" Subscript, 6 , Baseline , right parenthesis , left parenthesis, "x" Subscript, 7 , Baseline , "y" Subscript, 7 , Baseline , right parenthesis , left parenthesis, "x" Subscript, 8 , Baseline , "y" Subscript, 8 , Baseline , right parenthesis , right parenthesis Has graph.polygonx6,y6,x7,y7,x8,y8