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
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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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
chestercat
  • chestercat
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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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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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
gabbyalicorn
  • gabbyalicorn
wait but it doesnt say to round
gabbyalicorn
  • gabbyalicorn
okay well im going with A

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