A = Area.

C = Circumference

R = Radius

D = Diameter

Example:

1 Calculate the area of a 10" circle.

key in 10, press A(D)

The answer is 78.54.

2. Calculate the Diameter of 78.54 sq. in. circle.

press "shift", D(A).

The answer is 10.

For more information:

Using the "long press" gesture will display a hint about any key. (Video: Displaying a hint) You can inspect the Key Details to see the formulas and functions for any key.

Label | Description |
---|---|

A(R) | Calculates the area of a circle given the radius. |

A(D) | Calculates the area of a circle given the diameter. |

A(C) | Calculates the area of a circle given the circumference. |

C(R) | Calculates the circumference of a circle given the radius. |

C(D) | Calculates the circumference of a circle given the diameter. |

√ | Calculates the square root of x. |

x² | Calculates x squared. |

1/x | Calculates the reciprocal of x. |

SWAP | Swaps the x and y registers. |

÷ | Divides y by x. |

ROLL | Rolls the stack down. |

× | Multiplies y times x. |

− | Subtracts x from y. |

% | Calculates the x percent of y. |

+ | Adds y to x. |

Label | Description |
---|---|

R(A) | Calculates the radius of a circle given the area. |

D(A) | Calculates the diameter of a circle given the area. |

C(A) | Calculates the circumference of a circle given the area. |

R(C) | Calculates the radius of a circle given the circumference. |

D(C) | Calculates the diameter of a circle given the circumference. |

ln | Calculates the natural logarithm of x. |

exp | Calculates the base-e exponential of x. |

y^x | Calculates y raised to power of x. |

%T | Calculates what percentage x is of y. |

last x | Recalls the 'last x' value. |

clr m | Clears all of the user memory. |

clr s | Clears the stack registers (x, y, z, t). |

π | Enters pi into x. |

sin | Calculates the sine of x for the current degree/radian mode. |

cos | Calculates the cosine of x for the current degree/radian mode. |

tan | Calculates the tangent of x for the current degree/radian mode. |

rand | Calculates a random number greater than or equal to 0 and less than 1. |

asin | Calculates the arc sine of x for the current degree/radian mode. |

acos | Calculates the arc cosine of x for the current degree/radian mode. |

atan | Calculates the arc tangent of x for the current degree/radian mode. |

x! | Calculates the factorial of x. |

DEC x | Sets the number of decimal places to the value in x. |

INTG | Calculates the integer part of x. |

FRAC | Calculates the fractional part of x. |

RND | Rounds x to the number of digits displayed. |

nPr | Calculates the number of ordered ways that x objects can be chosen from a set of y objects. |

d/r | Switches between the degree and radian mode. |

⇒deg | Converts x from radians to degrees. |

⇒rad | Converts x from degrees to radians. |

Δ% | Calculates the percent change from y to x. |

nCr | Calculates the number of ways that x objects can be chosen from a set of y objects. |