Answer:
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Step-by-step explanation:
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To determine the perimeter of the pentagon, you must first calculate a side length of it. Let's name the coordinates A(-1,4) and B(2,3).
To figure out how far the points are from each other, you have to use the distance formula:



D_{AB}= \sqrt{(2--1)^2+{(3-4)^2}




Now, the formula for the perimeter of a pentagon is
P = 5×side length
So...
Perimeter = 5×

The answer is (2)
Answer:
5
Step-by-step explanation:
Let, the unknown side be x.
1/2 × 6.6m × xm = 16.5m²
or, x= 33/6.6
x= 5