Expression 16: polygon left parenthesis, "A" , "B" , "C" , right parenthesispolygonA,B,C
16
Expression 17: "g" left parenthesis, "x" , right parenthesis equals StartFraction, 20 left parenthesis, "b" plus "x" , right parenthesis Over StartRoot, "b" squared plus "x" squared , EndRoot , EndFraction minus 20 left brace, 0 less than "x" , right bracegx=20b+xb2+x2−200<x