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2 years ago

Identify the area of a regular decagon with side length 2 m rounded to the nearest tenth

Mathematics

1 answer:

Zina [86]2 years ago

5 0

Answer:

Area = 14.8

Step-by-step explanation:

Area = 5/2 + a^2*sqrt(5 + 2 sqrt(5) )

This formula given the side length, calculates the area.

a = 2

Area = 2.5 + 2^2 * sqrt(5 + 2*sqrt(5) )

Area = 2.5 + 4 * sqrt(5 + 2*2.236)

Area = 2.5 + 4* sqrt(5+ 4.4721)

Area = 2.5 + 4*sqrt(9.4721)

Area = 2.5 + 4*3.0776

Area = 2.5 + 12.3107

Area = 14.8107

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Ostrovityanka [42]

Answer:

$6 Sweet t saved on green-eyed fleas new album .

Step-by-step explanation:

As given

Sweet t saved 20% of the total cost of the green-eyed fleas new album .

.If the regular price is $30.

20% is written in the decimal form.

$= \frac{20}{100}$

= 0.20

Thus

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2 years ago

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ValentinkaMS [17]

That'd be 7/100 so 7%

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3 years ago

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Airida [17]

51 snack in all because 18 + 23 = 51

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2 years ago

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mr Goodwill [35]

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2 years ago

120÷(18-(20-3(9-5)simplify

Ilya [14]

Answer:

20÷[18-{20-3(4)}]

120÷[18-[20-12]]

120÷[18-8]]

120÷10

Step-by-step explanation:

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2 years ago