Thanks.
I already had an $incircle identifier made by someone called Enigma:

Code:
alias incircle { 
  if ($inrect($1,$2,$3,$4,$5,$5)) { 
    if ($calc(($1 - $3 - ($5 /2))^2 + ($2 - $4 - ($5 /2))^2) <= $calc(($5 /2)^2)) return $true 
  } 
}


$inroundrect will be very handy though, thanks smile