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1. A farmer wants to fence his four-sided plot
of flat land. He measures the first three
sides, shown in the figure as A, B, and C.
What is the correct length (in km) and angle
for the fourth side, D? Write your answer
with 3 significant figures.
D = ? km
D
y+A+B+C+D=0
C = 3.02 km
19⁰-
C
0= ?
7.5°
A = 4.70 km
A
B
16°
W
ZA
N
S
X
B = 2.48 km
E

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