Table of Contents
Advertisement
Circle and Arc Calculations
Remember to press
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
AREA & CIRCUMFERENCE - USING DIAMETER
Example: A circle has a diameter of 12 Inches. Calcuate its area and circumference.
KEY INPUT & DISPLAY
On/C
On/C
1
2
Inch
Circ
Circ
Circ
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.
* radius of a circle = 1/2 the diameter
KEY INPUT & DISPLAY
On/C
On/C
×
2
4
Feet
7
5
Arc
Arc
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
1. Input the chord length, using the "Run" key:
On/C
On/C
4
8
Feet
Inch
2. Input the segment rise:
2
6
Feet
Inch
3. Calculate the radius:
(Radius)
Conv
Arc
4. Calculate the arc angle:
Arc
5. Calculate the arc length:
Arc
to clear entries in between problems.
On/C
On/C
Circ
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
Advertisement
Table of Contents
