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Luden [163]
3 years ago
9

H E L P I M S L O W ! ! !

Mathematics
2 answers:
Nana76 [90]3 years ago
6 0

Answer:

Reflection across the x-axis

Step-by-step explanation:

The points are the same, just opposite of one another. The image looks as if it is a reflection. Think of the x-axis like a puddle and the shape looking into it; try to picture the image seeing its reflection to help.

bulgar [2K]3 years ago
3 0

Answer:

Reflection across the x-axis.

Step-by-step explanation:

The triangles mirror each other with the x-axis acting like said mirror.

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Find the area of a regular pentagon with apothem length of about 10.3 meters. Round to the nearest tenth if necessary.
matrenka [14]

Answer:

The area = 182.52 sq units.

Step-by-step explanation:

  1. Area of regular polygon can be found by splitting into smaller triangles.
  2. Each triangle has base as side of polygon and vertex as center of polygon.

now consider ΔOAB,

we know ∠AOB = \frac{360}{5}° =72°

<h3>     (this is due to symmetry)</h3>

as  ∠AOD = (∠AOB)/2 = 36°

Now we know AD=AB/2 =\frac{10.3}{2} =5.15 m

using trignometric relation tan(∠AOD) =\frac{AD}{OD}

⇒OD = \frac{AD}{tan(36)} = \frac{5.15}{tan(36)}

AREA OF TRIANGLE = BASE × HEIGHT /2

area of ΔOAD = \frac{1}{2} × 5.15 × \frac{5.15}{tan(36)}

     = \frac{(5.15)^2}{2tan(36)}

<u>As there are 10 such triangles like </u>ΔOAD

Total area =10×\frac{(5.15)^2}{2tan(36)}

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4 0
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jasenka [17]

Answer:

a. y = -x

b. Area = xy

c. x = -y

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a. The perimeter of the garden is the distance all the way around, in this would be x+y+x+y, or 2x + 2y. To solve for y, we’re trying to isolate it on one side. We need to subtract 2x to get 2y = -2x. Divide by 2 to get y = -x.

b. Area is length times width, so x • y, or xy.

c. To express in terms of x, we can take the equation y = -x and multiply it by -1 to get x = -y

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2 years ago
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