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irina1246 [14]
2 years ago
12

Find the area of the shaded region. Round your answer to the nearest hundredth.

Mathematics
1 answer:
Alborosie2 years ago
7 0

Answer:

Step-by-step explanation:

The formula for finding the area of a pentagon(regular) given 1 side is

A = \frac{1}{4}\sqrt{5(5+2\sqrt{5})}s^{2}\)

s (the side) = 12

Area = \frac{1}{4}\sqrt{5(5+2\sqrt{5})}12^{2}\)

Area = \frac{1}{4}\sqrt{5(5+2\sqrt{5})}144\)

Area = sqrt(5(5 + 2*2.2361) * 36

Area = sqrt(5( 5 + 4.4721)) * 36

Area = sqrt(5*9.4721) * 36

Area = sqrt(47.3606) * 36

Area = 6.882 * 36

Area = 247.7485

The area of the circle = pi r*2 but we don't have r.

If you know any trig, the formula for the radius of the circle is

R = s/(2*sin(180)/n)     n = 5 because you are using a 5 sided figure.

R = 12/(2*sin(180/5)

R = 12/2* sin(36)

R = 6 / sin(36)

R = 10.207

So the area of the circle is pi * R^2

Area = 3.14 * 10.2078^2

Area = 327.1854

The area of the shaded part is the difference between the 2 areas we found

Answer: 327.1854 -  247.7485

Answer: 79.44

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Similarly, to know the decimal that is less that 0.8 by 10 times, simply divide 0.8 by 10 as follows:
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This means that 0.8 is 10 times larger than 0.08
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10 gallons of gasoline costs $130. The cost of gasoline per gallon is
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I have 4 times as much money as my brother has. our total is $55.how much does each of us have?
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Answer:

You have 44$, your brother has 11$.

Step-by-step explanation:

Let x be the amount of money your brother has.

Since you have four times the amount of money your brother has, we can call the amount of money you have 4x.

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Thus, you have:

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The answer for the first equation is,

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A carpenter built a square table with side length x. Next, he will build a rectangular table by tripling one side and halving th
mart [117]

The simplified expression for the area of the rectangular table is Three-halves x squared, 3x²/2

<h3>What is the area of the rectangular table?</h3>

Since the carpenter built a square table with side length x.  Next, he will build a rectangular table by tripling one side and halving the other.

To find the area of the rectangular table, we know that Area, A = LW where

  • L = length and
  • W = width

Now, since the length of the square is x, and the rectangular table has one side of the square tripled and halving the other side .

So,

let

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  • width of rectangular = W = 3x

So, the area of the rectangular table A = LW

= x/2 × 3x

= 3x²/2

So, the simplified expression for the area of the rectangular table is Three-halves x squared, 3x²/2

Learn more about area of rectangular table here:

brainly.com/question/23807625

#SPJ1

8 0
1 year ago
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