gabbyalicorn
  • gabbyalicorn
What is the approximate perimeter of the figure? A. 7.85 in. B. 12.9 in. C. 17.9 in. D. 31.4 in.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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gabbyalicorn
  • gabbyalicorn
1 Attachment
geerky42
  • geerky42
This looks like 1/4 of circle, right?
gabbyalicorn
  • gabbyalicorn
right

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More answers

geerky42
  • geerky42
yeah, so that arc would be 1/4 the circumference. Agree?
gabbyalicorn
  • gabbyalicorn
yeppers
geerky42
  • geerky42
And you also have two radii |dw:1433134466763:dw|
geerky42
  • geerky42
You know what's total length of these thick lines?
gabbyalicorn
  • gabbyalicorn
90 is the length?
geerky42
  • geerky42
|dw:1433134560634:dw|
geerky42
  • geerky42
That's 5+5
gabbyalicorn
  • gabbyalicorn
oh 10
geerky42
  • geerky42
Yep, easy part. Now arc. Again it's 1/4 of circumference, so what is it?
gabbyalicorn
  • gabbyalicorn
is there anyway to convert 1/4 into like a number?
geerky42
  • geerky42
You can just divide it by 4?
gabbyalicorn
  • gabbyalicorn
2.5
geerky42
  • geerky42
Or you can use calculator to find 1/4 \(1\div4\)
geerky42
  • geerky42
It's not 2.5 btw
gabbyalicorn
  • gabbyalicorn
0.25
geerky42
  • geerky42
yeah, so you multiply circumference by 0.25
gabbyalicorn
  • gabbyalicorn
but i thought the circumference is 0.25
geerky42
  • geerky42
no no. it's just that you find whole circumference, THEN you multiply it by 0.25
gabbyalicorn
  • gabbyalicorn
so, 4 x 0.25?
gabbyalicorn
  • gabbyalicorn
no that wouldn't make sense
geerky42
  • geerky42
What is circumference? \(C = 2\pi r\), right?
geerky42
  • geerky42
Find that then you multiply it by 0.25
geerky42
  • geerky42
\(\dfrac{C}{4}\) or \( 0.25C\)
gabbyalicorn
  • gabbyalicorn
oh so 2 x 3.14 = 6.28 x 0.25 = 1.57
geerky42
  • geerky42
you forgot radius. From picture, radius is 5, right?
gabbyalicorn
  • gabbyalicorn
oh oops so then it would be 7.85
gabbyalicorn
  • gabbyalicorn
A :D !!!
geerky42
  • geerky42
Not quite
geerky42
  • geerky42
That is correct, but you forgot to add two radii
geerky42
  • geerky42
as final answer
gabbyalicorn
  • gabbyalicorn
wait 2
gabbyalicorn
  • gabbyalicorn
so 10
gabbyalicorn
  • gabbyalicorn
instead of 5
geerky42
  • geerky42
|dw:1433135159595:dw|
gabbyalicorn
  • gabbyalicorn
-3- i thought we just did that...
geerky42
  • geerky42
yeah we did. Now we add them together.
geerky42
  • geerky42
|dw:1433135231571:dw|
gabbyalicorn
  • gabbyalicorn
17.85
geerky42
  • geerky42
|dw:1433135261928:dw|
geerky42
  • geerky42
Yep.
gabbyalicorn
  • gabbyalicorn
:D thank you so much! I know i cant really show it through typing but I REALLY APPRECIATE YOU HELPING ME! :D
geerky42
  • geerky42
No problem!
gabbyalicorn
  • gabbyalicorn
im looking at the answer but why does a havethe 1 not there?
gabbyalicorn
  • gabbyalicorn
its c because we round right?
gabbyalicorn
  • gabbyalicorn
@geerky42
gabbyalicorn
  • gabbyalicorn
wait but it doesnt say to round
gabbyalicorn
  • gabbyalicorn
okay well im going with A

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