All categories

3 years ago

Circumference of a circle

Mathematics

2 answers:

irakobra [83]3 years ago

5 0

Answer:

Multiply the radius by 2 to get the diameter.

Multiply the result by π, or 3.14 for an estimation.

That's it; you found the circumference of the circle.

Step-by-step explanation:

k0ka [10]3 years ago

4 0

Answer:

Step-by-step explanation:

the straight sides are just 4.5 *2 = 9 cm

the arcs are 2 $\pi$ r * Ф/360

where Ф= 50 for this problem

and r = 8

the inner arc is 2 $\pi$ (3.5) *50/360 = 3.05432

the outer arc is 2 $\pi$ (8)*50/360 = 6.98131

total is 19.0356

to 3 sig figs is 19.036 :)

You might be interested in

HELP ME PLZZZZ!!!!!!!!!!!!!!!!!!

Alekssandra [29.7K]

the radius of the distance between the middle point of the circle and the outside, we have the diameter which is 6 so the radius will be 3

slant height is

$\sqrt{r^2+h^2}$

h is 4.7 and r is 3

$\sqrt{3^2+4.71^2} \\5.58427$

slant height is 5.58427

lateral surface area

$\pi r\sqrt{h^2+r^2}$

$\pi (3)\sqrt{4.71^2+3^2} \\52.63053$

lateral surface area is 52.63053

total surface area

$\pi r(r+\sqrt{h^2+r^2})$

$\pi 3(3+\sqrt{4.71^2+3^2})$

$80.90486$

total surface area is 80.90486

8 0

2 years ago

(m+3n) ^2 please help me solve this question, I really need it

Charra [1.4K]

Answer:

=m2+6mn+9n2

Step-by-step explanation:

=(m+3n)(m+3n)

=(m)(m)+(m)(3n)+(3n)(m)+(3n)(3n)

=m2+3mn+3mn+9n2

7 0

3 years ago

What is the degree measure of an arc 4(pi) ft. long in a circle of radius 10 ft.?

olya-2409 [2.1K]

Hey there!

$20*pi/360=4*pi/x solve for x x=360*4*pi/(20*pi)=72 degrees$

Your correct answer would be. . .

$\boxed{\boxed{72}}$

Hope this helps.
~Jurgen

3 0

3 years ago

Read 2 more answers

Sally makes 7 out of every 10 shots she takes during practice. If this pattern were to continue, how many would she make during

Levart [38]

Answer:

Step-by-step explanation:

7 for first 10 shots
7 for another 10 shots
7 for last 10 shots

4 0

3 years ago

Read 2 more answers

Drag the tiles to the boxes to form correct pairs. Not all tiles will be used.

OverLord2011 [107]

Answer:

Here you go, I think

Step-by-step explanation:

5 0

3 years ago