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igor_vitrenko [27]
3 years ago
10

I need help on this question ( Please show all work and explain clearly )

Mathematics
2 answers:
Nadya [2.5K]3 years ago
8 0

Answer:

C

Step-by-step explanation:

The equation of the area of a circle is \pi r^{2}.

We already know the diameter is 8, and the radius is half of the diameter, so it would be 4.

\pi 4^{2}. This is our equation now. Now, we need to square 4, and 4x4 is 16.

Since 16\pi and \pi16 are the same, C is the correct answer.

Vanyuwa [196]3 years ago
5 0

Answer:

C

Step-by-step explanation:

The area (A) of a circle is calculated as

A = πr² ( where r is the radius )

Here diameter = 8 cm , thus r = 8 ÷ 2 = 4 cm , thus

A = π × 4² = 16π cm² → C

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Find the area of the regular polygon below. leave your answer in simplest radical form.
Licemer1 [7]

Answer:

384√3 in²

Step-by-step explanation:

Given in the question a regular 6 sided polygon

To find it's area you have to use the following formula

<h3>      1/2 x perimeter x apothem</h3>

<em>Perimeter = the sum of the lengths of all the sides </em>

<em>Suppose length of one side = x</em>

<em>Apothem = a segment that joins the polygon's centre to the midpoint of any side that is perpendicular to that side = 8√3</em>

<em />

Since the polygon have 6 sides so

perimeter = 6x

<h3>x = 2(8√3)/√3</h3>

x = 2(8)

x = 16

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plug values in the formula of area

<h3>1/2 x 96 x 8√3</h3>

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6 0
3 years ago
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The triangles in the figure are similar: ΔABC ∼ ΔDEF. Which of the following statements must be true? options: A) AB/DE=BC/EF=CA
VikaD [51]

Answer:

Answer A

Step-by-step explanation:

We see that ABC is similar to DEF. Pay attention to the order of these letters. The order that they read (left-to-right) is the order that they are similar. For example, AB is similar to DE. Despite being different triangles, they are both the <em>first two </em>letters in the triangle. So, knowing this, we can conclude that answer choice A is correct.

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jok3333 [9.3K]

Answer:

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Step-by-step explanation:

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nirvana33 [79]
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Answer:

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Step-by-step explanation:

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