Binibini

Binibini owns a triangular residential lot bounded by two roads which intersect at 70°. The sides of the lot along the road are 62m and 43m respectively. Find the length of the fence needed to enclose the lot. (express answers to the nearest hundreths)

Correct answer:

o =  167.2 m

Step-by-step explanation:

a=62 m b=43 m γ=70   aγb  c2=a2+b22 a b cosγ c=a2+b22 a b cosγ=a2+b22 a b cos70° =622+4322 62 43 cos70° =622+4322 62 43 0.34202=62.20409 m  o=a+b+c=62+43+62.2041=167.2 m

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