Answer
$= 342$ m$^{2}$
Work Step by Step
$A = \frac{1}{2}acsin(B)$
$= (0.5)(41.5)(34.5)sin(151.5)$
$= (0.5)1431.75sin(151.5)$
by GDC / calculator
$= (0.5)(683.172055)$
$= 341.586...$ m$^{2}$
$= 342$ m$^{2}$
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