Answer:
<h2>54m²</h2>
Step-by-step explanation:
<h3>METHOD 1:</h3>
You can use the Heron's formula:

where
<em>p</em><em> - half of perimeter</em>
<em>a, b, c</em><em> - lengths of sides</em>
We have

Calculate:

<h3>METHOD 2:</h3>
Let's check that it is not a right triangle.
If the sum of the squares of the two shorter sides is equal to the square of the longest side, then this triangle is rectangular.
We have

Check:

This is a right trianglr wherew 9m and 12m are legs and 15m is a hypotenuse.
The formula of an area of a right triangle is:

<em>a, b</em><em> - legs</em>
Substitute:

the answer is 5.5
when we write root of 30 in the calculater we get 5.477225575...
so we can round this off to one decimal point
and when we do the final answer will be 5.5
<em>hope</em><em> </em><em>that</em><em> </em><em>helps</em><em> </em><em>!</em>
Hello there.
<span>Solve for p: a = 2πpw
</span>