Error message

  • Warning: preg_match(): Unknown modifier '2' in os_check() (line 193 of /var/www/custom/tools/tools.inc).
  • Warning: preg_match(): Unknown modifier 'T' in os_check() (line 193 of /var/www/custom/tools/tools.inc).
Circle calculator
r (radius)
d (diameter)
c (circumference)
a (area)
²
v (volume)
³
Enter only one value