Question

What is the approximate perimeter of a semicircle with a radius of 9 mm?

Use π ⁢ = 3.14.
Express your final answer to the nearest hundredth.

I THINK IT IS 56.52

Answer 1

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Answer 2

= 2(3 + 6)
= 2(9)
= 18

Answer (1): 18 mm assuming it's a rectangle
----------------
= (12 * 2 * 22/7)/2 + 2(12)
= (528/7)/2 + 24
= 264/7 + 168/7
= 432/7 or 61 5/7

Answer (2): 61 5/7 centimeters OR 61.7 1/7 centimeters

Answer 3

= 2(3 + 6)
= 2(9)
= 18

Answer (1): 18 mm assuming it's a rectangle
----------------
= (12 * 2 * 22/7)/2 + 2(12)
= (528/7)/2 + 24
= 264/7 + 168/7
= 432/7 or 61 5/7

Answer (2): 61 5/7 centimeters OR 61.7 1/7 centimeters

Answer 4

its not perimeter its circumference

Answer 5

Please avoid Mass tagging

Answer 6

= 2(3 + 6)
= 2(9)
= 18

Answer (1): 18 mm assuming it's a rectangle
----------------
= (12 * 2 * 22/7)/2 + 2(12)
= (528/7)/2 + 24
= 264/7 + 168/7
= 432/7 or 61 5/7

Answer (2): 61 5/7 centimeters OR 61.7 1/7 centimeters

Answer 7

okay

Answer 8

thx

Answer 9

no problem

Answer 10

@Unanimoose what do u think

Answer 11

and in order to find the circumference you want to try 2piR

Answer 12

Yeah.

Answer 13

So 2 times pi and the radius

Answer 14

it is 61.7

Answer 15

so the radius would be nine

Answer 16

is it @Unanimoose and if so, how

Answer 17

right from here multiply pi and the radius then multiply by two

Answer 18

61.7

Answer 19

i mean

Answer 20

okay

Answer 21

\[C = 9^2\pi\]

Answer 22

ohh, so 9

Answer 23

???

Answer 24

hhhhhmmmm...

Answer 25

i got 28.26 lol

Answer 26

yeah, is it 28.26

Answer 27

lol

Answer 28

ya i am right yay i am impressed me 6 grader i did it lol

Answer 29

\[C = 81\pi\]
\[C = 254.\]

Answer 30

?????

Answer 31

254/2 = 127.17

Answer 32

weird how u get that

Answer 33

Um yeah Idk if i did it wrong or right.

Answer 34

no

Answer 35

Because a semicircle you just find the circumference of a regualr circle then half.

Answer 36

cuz a semicircle is jsut half a circle

Answer 37

u did that wrong, cause I can not type it all in

Answer 38

Did I do it right

Answer 39

yea

Answer 40

i just pretended the semi circle was full circle found circumference and divided that by two

Answer 41

i think you found the area of the circle

Answer 42

it is 28.26, right??

Answer 43

Oh i squared it oops.

Answer 44

haha

Answer 45

if you used the formula pi time Radius squared you might get your answer that the area of circle

Answer 46

tats ok

Answer 47

lol

Answer 48

But tyes it's 28.26.

Answer 49

yes*

Answer 50

it is

Answer 51

up could you press best response please??

Answer 52

okay

Answer 53

thx guys

Answer 54

bye up

Answer 55

I already did, I will tag you again in a different question though

Answer 56

ok

Answer 57

hold on a sec...

Answer 58

ok

Answer 59

So did I do it right I hope I did

Answer 60

I do not think u did :(

Answer 61

yes all you have to do is use the right formula and then everything is accomplishable

Answer 62

unless you use the formula wrong lol

Answer 63

lol

Answer 64

Awe man sorry

Answer 65

46.21?

Answer 66

28.26