Press r to calculate radius (Press 1 to calculate from diameter, 2 from circumference, 3 from area) Press d to calculate diameter (Press 1 to calculate from radius, 2 from circumference, 3 from area) Press C to calculate circumference (Press 1 to calculate from radius, 2 from diameter, 3 from Area) Press A to calculate Area (Press 1 to calculate from radius, 2 from diameter, 3 from Circumference)
USES 3.14 NOT π
