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U
SER
’
S
G
UIDE
— 39
CIRCLE AND ARC CALCULATIONS
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 o twice)
after calculating right-triangle solutions prior to beginning an Arc or
Circle solution.
Note: Circle/Arc solutions cannot be solved for the following cases:
• Entered Arc Length and Chord Length (Run)
• Entered Arc Length and Segment Rise (Rise)
Circumference and Area of a Circle
Find the area and circumference of a circle with a diameter of
11 Inches:
KEYSTROKE DISPLAY
o o 0.
1 1 i C DIA 11 INCH
C AREA 95.03318 SQ INCH
C CIRC 34-9/16 INCH
Arc Length —
Degree and Diameter Known
Find the arc length of an 85° portion of a circle with a 5-foot diameter:
KEYSTROKE DISPLAY
o o 0.
5 f C DIA 5 FEET 0 INCH
8 5 a ARC 85.00°
a ARC 3 FEET 8-1/2 INCH
Arc Length —
Chord Length and Segment Rise Known
Find the arc length and radius of a circle with a 3-feet 6-inch chord
length and 1-foot 3-inch segment rise.
KEYSTROKE DISPLAY
1. Enter the chord length of the segment as Run:
o o 0.
3 f 6 i R RUN 3 FEET 6 INCH
2. Enter the height of the segment as Rise:
1 f 3 i r RISE 1 FEET 3 INCH
3. Find the Radius:
Ç a
(Radius)
RAD 1 FEET 10-3/16 INCH
(Cont’d)
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