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USER’S GUIDE — 59
(Cont’d)
KEYSTROKE DISPLAY
1. Enter side a, b and c:
o o 0.
3 5 f 8 i 3 / 4 Ç 4 A 35 FEET 8-3/4 INCH
2 1 f 8 i 1 5 / 1 6 Ç 5
B 21 FEET 8-15/16 INCH
2 4 f 3 i 7 / 8 Ç 6 C 24 FEET 3-7/8 INCH
2. Calculate and input Theta by subtracting Angle “A” (found by the
Law of Cosines) from known angle of 180°:
1 8 0 – Ç 9 /
_
A 101.5687°
= 78.43128 (Theta θ)
p /
_
Ø 78.43128°
3. Recall stored “c” and input as “r” the Hypotenuse:
® 6 = d R 24 FEET 3-7/8 INCH
4. Calculate “x”:
R X 4 FEET 10-9/16 INCH
5. Calculate “y”:
r Y 23 FEET 9-15/16 INCH
Sheet Metal Panels for an Irregular Hip Roof
A contractor is going to cover one end of an Irregular Hip Roof with
sheet metal panels. The length of the roof along the eave is 98 Feet
5-1/4 Inches, the length along the left hip is 38 Feet 10-11/16
Inches, and the length along the right hip is 73 Feet 1-1/8 Inches.
Find the angles between the roof edges.
KEYSTROKE DISPLAY
1. Enter lengths:
9 8 f 5 i 1 / 4 Ç 4 A 98 FEET 5-1/4 INCH
3 8 f 1 0 i 1 1 / 1 6 Ç 5
B 38 FEET 10-11/16 INCH
7 3 f 1 i 1 / 8 Ç 6 C 73 FEET 1-1/8 INCH
2. Calculate the angles between the roof edges:
Ç 9 /
_
A 119.9081°
9 /
_
B 20.02713°
9 /
_
C 40.06473°
9 AREA 1232.046 SQ FEET
STORED
STORED
STORED
STORED
STORED
STORED
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