What does ¶ Mean!?

**Melissa911** · August 7th 2008, 04:34 PM

Hello
I Am very stumped.
I need to know what this symbol means.

¶?????
here it is in a equation
1 radian = 180 degrees / ¶

5 x 1 radian = 5 x 180 degrees / ¶

5 radians = 286.5 degrees
does anyoe know the value or meaning or name of this symbol?
If someone could help me that would be great thank you!!

**o_O** · August 7th 2008, 04:40 PM

Actually the symbol you're looking for is $\pi$ . What you have is a symbol that marks the end of lines/paragraphs (such as in Microsoft Word).

Here's an entire article for you: Pi

**Melissa911** · August 7th 2008, 04:43 PM

Are you sure that the symbol means pi?
because this is the exact formula from the lesson in math 30 applied that I am working on rite now.

1 radian = 180 degrees / ¶

If it was pi? why wouldnt they just put pi... instead of confusing the

out of me?

**o_O** · August 7th 2008, 04:50 PM

Yes it is pi and its symbol is $\pi$ . What you've learned is a conversion between two different ways to express angles: 1 radian is equal to $\frac{180}{\pi} \: \text{degrees}$ or equivalently, 1 degree is equal to $\frac{\pi}{180^{\circ}}$ .

With this new notation, we can see that, for example, $30^{\circ} = 30^{\circ} \cdot \frac{\pi}{180^{\circ}} = \frac{\pi}{6}$

When writing in terms of radians, usually we leave it unitless (if you want, add the unit 'rad' to the end).

**Melissa911** · August 7th 2008, 04:52 PM

Ok.... if you say so Ill give that a try
Thank-you very much.

**ticbol** · August 7th 2008, 06:36 PM

Originally Posted by Melissa911

Are you sure that the symbol means pi?
because this is the exact formula from the lesson in math 30 applied that I am working on rite now.

1 radian = 180 degrees / ¶

If it was pi? why wouldnt they just put pi... instead of confusing the

out of me?

! I really like that. Your comment.

That's just the beginning. Wait till you encounter other weird symbols that mathematicians use.

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What does ¶ Mean!?