The location of the first battle of bull run was significant because

The First Battle of Bull Run or the First Battle of Manassas as it is also called, resulted in thousands of lives lost; and as such it if referred to as first major land battle of the American Civil war. It was an incident of high importance where two untried armies met on the battlefield for the first time.

Explanation:

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34

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