表达式4: "R" equals StartRoot, csc squared "p" plus left parenthesis, "p" minus "X" , right parenthesis squared , EndRootR=csc2p+p−X2
equals=
1.1 0 7 0 9 7 7 4 3 61.1070977436
4
表达式5: left parenthesis, "x" minus "X" , right parenthesis squared plus "y" squared equals "R" squaredx−X2+y2=R2
5
表达式6: polygon left parenthesis, left parenthesis, "X" , 0 , right parenthesis , left parenthesis, "p" , csc "p" , right parenthesis , right parenthesispolygonX,0,p,cscp
