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Circle and Arc Calculations
Remember to press
Circle/Arc values can be solved by entering any two of the following values: Arc Length/Angle,
Diameter/Radius, Chord Length (Run), and Segment Rise (Rise). It is recommended that you clear
the calculator (press
Circle solution.
Note: Circle/Arc solutions cannot be solved for the following cases:
• Entered Arc Length and Chord Length (Run) or Entered Arc Length and Segment Rise (Rise)
CIRCUMFERENCE AND AREA OF A CIRCLE
Example: Find the area and circumference of a circle with a diameter of 12 Inches:
KEY INPUT & DISPLAY
On/C
On/C
1
2
Inch
Circ
Circ
Circ
ARC LENGTH – DEGREE AND DIAMETER KNOWN
Example: Find the arc length of an 75˚ portion of a circle with a 8-foot diameter:
KEY INPUT & DISPLAY
On/C
On/C
8
Feet
Circ
7
5
Arc
Arc
ARC LENGTH – CHORD LENGTH AND SEGMENT RISE KNOWN
Example: Find the arc length and radius of a circle with a 4-feet 8-inch chord length and 2-foot 6-inch
segment rise.
KEY INPUT & DISPLAY
1. Enter the chord length of the segment as Run:
On/C
On/C
4
8
Feet
Inch
2. Enter the height of the segment as Rise:
2
6
Feet
Inch
3. Find the radius:
(Radius)
Conv
Arc
4. Find the arc angle:
Arc
5. Find the arc length:
Arc
to clear entries in between problems.
On/C
On/C
twice) after calculating right-triangle solutions prior to beginning an Arc or
On/C
Run
Rise
Page 17
0
DIA 12
Inch
AREA 113.0973
SQ Inch
CIRC 37-11/16
Inch
0
DIA 8
0
Feet
Inch
ARC 75.00˚
ARC 5
2-13/16
Feet
Inch
0
RUN 4
8
Feet
Inch
RISE 2
6
Feet
Inch
RAD 2
4-1/16
Feet
Inch
ARC 187.90˚
ARC 7
8-1/16
Feet
Inch
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