POCKET REFERENCE GUIDE — 21
Law of Cosines/Triangle Area
Using Sides a, b and c, find the corre-
sponding angles A, B and C:
--Side a: 38 feet 5 inches
--Side b: 23 feet 4-9/16 inches
--Side c: 26 feet 1-13/16 inches
KEYSTROKE DISPLAY
o o 0.
1. Enter side a, b and c:
3 8 f 5 i Ç 4
A STORED 38
FEET 5 INCH
2 3 f 4 i 9 / 1 6 Ç 5
B STORED 23
FEET 4-9/16 INCH
2 6 f 1 i 1 3 / 1 6 Ç 6
C STORED 26
FEET 1-13/16 INCH
2. Calculate angles A, B and C:
Ç 9 <A 101.5734°
9 <B 36.59978°
9 <C 41.8268°
3. Calculate triangle area:
9 AREA 299.4929 SQ FEET
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