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3 years ago

Find the perimeter and area: A pentagon has side lengths of 11cm.

Mathematics

2 answers:

LenaWriter [7]3 years ago

4 0

Perimeter: To calculate the perimeter is easy, just multiply 11cm by the number of sides, which in this case, is 5.

So 5 * 11cm = 55cm.

Area: To calculate the area, it's a bit more tricky, the formula is $\frac{1}{4} \sqrt{5(5+2+ \sqrt{5} )} s^{2}$ .

Since it's very hard to do, I got a calculator and did it.

And the answer is: $208.18cm^{2}$ 

Hope this helped! c:

hram777 [196]3 years ago

3 0

Let's find the perimeter and area.

Perimeter
A pentagon has 5 sides. Each side is 11 cm. All we need to do is multiply the length of each side by how man sides there are.
5×11=55

So, the perimeter is 55 cm.

Area
It's a very challenging formula for finding the area of a pentagon and there are calculators used for finding the area of shapes like the pentagon and that's what I used.

The area is 208.178 cm²

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klio [65]

Answer:

ALL SUCH NUMBERS WHICH ARE GREATER THAN -4 satisfy the given condition.

Step-by-step explanation:

Here, assume such number = m

Now, given :

3 times the number = 3 x ( m) = 3 m

8 less than the given number = m - 8

Now, according to the question:

3 times the number > 8 less than the given number

or, 3 m > m - 8

or, 3m - m > m - 8 + m

or, 2 m > - 8

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Hence, all SUCH NUMBERS WHICH ARE GREATER THAN -4 satisfy the given condition.

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3 years ago

Find x Plz help me !!!

mel-nik [20]

Answer:

$\Huge\boxed{x=33.2}$

Step-by-step explanation:

Hello there!

We can solve for x using law of sines

As we can see in the image a side length divided by sin ( its opposite angle) = a different side length divided by sin ( its opposite angle)

So we can use this equation to solve for x

$\frac{21}{sin(35)} =\frac{x}{sin(65)}$

Our objective is to isolate the variable using inverse operations so to get rid of sin (65) we multiply each side by sin (65)

$\frac{x}{sin(65)} sin(65)=x\\\\\frac{21}{sin(35)} sin(65)=\frac{21sin(65)}{sin(35)}$

we're left with

$x=\frac{21sin(65)}{sin(35)}\\x=33.18208755$

assuming we have to round the answer would be 33.18 or 33.2

7 0

3 years ago

Use the arc length formula and the given information to find r. s = 12 cm, 0 = 360; r = ?

hjlf

use s=r0

but first convert 360 degree to radian
you will get 6.284 radian

then you substitute and get the answer!

12= r (6.284)
r= 1.91 cm

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3 years ago

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Answer:

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Andrew [12]

I think what you need to do is make B = -5
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4 years ago