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Nadusha1986 [10]
3 years ago
10

The coordinates of the vertices of a polygon are (-2, 1). (-3, 3), (-1, 5), (2, 4), and (2, 1). What is the perimeter of the pol

ygon to the nearest tenth of a unit.
Do not label your answer. Answer with a number only.

Mathematics
1 answer:
Marysya12 [62]3 years ago
6 0

Answer:

<u>Perimeter </u>

\bf \boxed{7+\sqrt{5}+\sqrt{8}+\sqrt{10}}

Step-by-step explanation:

Draw the polygon to have an idea of what you are being asked.

<h3>See picture attached </h3>

Now find the length of each side and add them up, that is the perimeter.

To find the length of a side use the formula of the distance between to points (a,b) and (c,d)

\bf \sqrt{(a-c)^2+(b-d)^2}

<u>Distance between (-2,1) and (-3,3) </u>

\bf \sqrt{(-2-(-3))^2+(1-3)^2}=\sqrt{5}

<u>Distance between  (-3,3) and (-1,5) </u>

\bf \sqrt{(-3-(-1))^2+(3-5)^2}=\sqrt{8}

<u>Distance between  (-1,5) and (2,4) </u>

\bf \sqrt{(-1-2)^2+(5-4)^2}=\sqrt{10}

<u>Distance between (2,4) and (2,1) (obviously 3) </u>

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

<u>Distance between (2,1) and (-2,1) (obviously 4) </u>

\bf \sqrt{(-2-2)^2+(1-1)^2}=4

Add up all the lengths

\bf \sqrt{5}+\sqrt{8}+\sqrt{10}+3+4

<u>Perimeter </u>

\bf \boxed{7+\sqrt{5}+\sqrt{8}+\sqrt{10}}

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Step-by-step explanation:

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<u>Double the second equation and subtract equations:</u>

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