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3 years ago

Can someone help me with number 6

Mathematics

1 answer:

kramer3 years ago

5 0

What is your question and is it about math

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Find the area of circle having 176cm circumference.With step by step explanation.plz

Olin [163]

Answer:

$\huge\boxed{A=784\pi\ cm^2\approx2464\ cm^2}$

Step-by-step explanation:

The formula of a circumference of a circle:

$C=2\pi r$

r - radius

The formula of an area of a circle:

$A=\pi r^2$

r - radius

We have C = 176cm. Substitute to the formula and calculate the radius r:

$2\pi r=176\qquad|\text{divide both sides by}\ 2\pi\\\\r=\dfrac{176}{2\pi}\\\\r=\dfrac{88}{\pi}\qquad|\text{use}\ \pi\approx\dfrac{22}{7}\\\\r=\dfrac{88}{\frac{22}{7}}\\\\r=88\cdot\dfrac{7}{22}\\\\r=4\cdot7\\\\\boxed{r=28(cm)}$

Calculate the area:

$A=\pi\cdot28^2=784\pi\approx784\cdot\dfrac{22}{7}=112\cdot22=2464(cm^2)$

According to the moderator, I should take $\pi\approx3.14$ . You can do it like that. In my opinion, my solution is correct.

6 0

3 years ago

5 years = ______ months

Papessa [141]

60 months
Hope this helped ;)

5 0

3 years ago

Read 2 more answers

8 - 3x4 + 6/2 what’s the answer? help plz i really need help

Anastaziya [24]

Answer:

3 2/5

Step-by-step explanation:

8-3x4

ok well do 3x4 that is 12

so do 12 minus 8 which is 4. and 4 as a fraction is 2/5 so

do 6/2 plus 2/5

which is.....

.....

3 and 2/5

6 0

4 years ago

What is the perimeter of rhombus WXYZ?

oksian1 [2.3K]

Answer:

The perimeter of rhombus WXYZ is $4 \sqrt{13}$

Step-by-step explanation:

Step 1 :Finding length of XY

Distance formula = $\sqrt{(x_2-x_1)^2 +(y_2-y_1)^2}$

here

$x_1$ = 5

$x_2$ =3

$y_1$ = -1

$y_2$ =2

XY = $\sqrt{(3-5)^2 +(2 -(-1))^2}$

XY = $\sqrt{(3-5)^2 +(2 +1))^2}$

XY = $\sqrt{(-2)^2 +(3))^2}$

XY = $\sqrt{4 +9}$

XY = $\sqrt{(13)}$

Step 2 :Finding length of YZ

Distance formula = $\sqrt{(x_2-x_1)^2 +(y_2-y_1)^2}$

here

$x_1$ = 3

$x_2$ =5

$y_1$ = 2

$y_2$ =5

YZ = $\sqrt{(5-3)^2 +(5-2)^2}$

YZ = $\sqrt{(2)^2 +(3)^2}$

YZ = $\sqrt{4 +9}$

YZ = $\sqrt{(13)}$

Step 3 : :Finding length of ZW

Distance formula = $\sqrt{(x_2-x_1)^2 +(y_2-y_1)^2}$

here

$x_1$ = 5

$x_2$ =7

$y_1$ = 5

$y_2$ =2

ZW = $\sqrt{(7-5)^2 +(5-2)^2}$

ZW = $\sqrt{(2)^2 +(3)^2}$

ZW = $\sqrt{4 +9}$

ZW = $\sqrt{(13)}$

Step 4 :Finding length of WX

Distance formula = $\sqrt{(x_2-x_1)^2 +(y_2-y_1)^2}$

here

$x_1$ = 7

$x_2$ =5

$y_1$ = 2

$y_2$ = -1

WX = $\sqrt{(7-5)^2 +((-1)-2)^2}$

WX = $\sqrt{(2)^2 +(-3)^2}$

WX = $\sqrt{4 +9}$

WX = $\sqrt{(13)}$

Step 5: finding the perimeter of the rhombus

Perimeter= 4 X side

=> $4 \times \sqrt{13}$

=> $4 \sqrt{13}$

5 0

3 years ago

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Is is the square root of 47 irrational or rational

scoray [572]

the square root of is 47 irrational

5 0

3 years ago

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