Geometry: Straight line 21 inches long, required to some formula to make this line a

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tuancally

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Straight line 21 inches long, required to some formula to make this line a perfect circle.
 
tuancally said:
Straight line 21 inches long, required to some formula to make this line a perfect circle.
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What are your thoughts?

Please share your work with us ...even if you know it is wrong

If you are stuck at the beginning tell us and we'll start with the definitions.

You need to read the rules of this forum. Please read the post titled "Read before Posting" at the following URL:

http://www.freemathhelp.com/forum/announcement.php?f=33
 
tuancally said:
Straight line 21 inches long, required to some formula to make this line a perfect circle.
Click to expand...
As stated, the exercise makes very little sense. Please reply with the full and exact text of the exercise, the complete instructions, and a detailed description of (or else a scan of) any required graphical content. For instance, we'll need your book's definition of "making" a line into something else, and maybe an example of the sort of "formula" the book intends to be applied to this sort of exercise.

When you reply, please include a clear listing of your thoughts and efforts so far. Thank you! ;)
 
Has your class been working with coordinate geometry? There is an algebraic equation whose solutions form a perfect circle, centered at the origin, on the xy-coordinate plane.

x^2 + y^2 = r^2

Here, symbol r represents the length of the circle's radius (a constant). Symbols x and y are variables because they take on many values -- in (x,y) pairs -- to form the coordinates of individual points comprising the circle.

You can find the length of your circle's radius, by using the given circumference in a different formula: C = 2*Pi*r

I'm not sure what else they could be talking about. :)
 
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