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AREA & CIRCUMFERENCE - USING DIAMETER
Example: A circle has a diameter of 12 Inches. Calcuate its area and circumference.
KEY INPUT & DISPLAY
0
CIRC 37-11/16
Inch
DIA 12
Inch
AREA 113.0973
SQ Inch
Circle and Arc Calculations
This calculator can solve for Circle and/or Arc equations with the input of any* two of the following
variables: Arc Length, Arc Angle, Diameter, Radius, Chord Length / Run, or Segment Rise / Rise.
*Exceptions are that Circle/Arc calculations cannot be made using either of these two combinations of variables:
Arc Length and Chord Length / Run
Arc Length and Segment Rise / Rise
Remember to press to clear entries in between problems.
On/C On/C
ARC LENGTH - USING RADIUS & ARC ANGLE
Example: A circle has a radius* of 4 Feet. Calculate the arc length of a 75° portion of the circle.
KEY INPUT & DISPLAY
0
ARC 5
Feet
2-13/16
Inch
DIA 8
Feet
0
Inch
ARC 75.00˚
ARC LENGTH & RADIUS - USING CHORD LENGTH & SEGMENT RISE
Example: A segment of a circle has a cord lenghth of 4 Feet 8 Inches and and rise of 2 Feet 6 Inches.
Calculate the radius and arc values (angle and length).
KEY INPUT & DISPLAY
0
RUN 4
Feet
8
Inch
1. Input the chord length, using the “Run” key:
RISE 2
Feet
6
Inch
2. Input the segment rise:
RAD 2
Feet
4-1/16
Inch
3. Calculate the radius:
ARC 187.90˚
4. Calculate the arc angle:
ARC 7
Feet
8-1/16
Inch
5. Calculate the arc length:
* radius of a circle = 1/2 the diameter
On/C On/C
Circ
CircInch
1 2
Circ
On/C On/C
Run
Feet Inch
84
Feet Inch
Rise
ArcConv
6
2
(Radius)
Arc
Arc
On/C On/C
Feet
Circ
Arc
7 5
Arc
×
2
4