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### Longitude Degrees at the Equator

```
Date: 09/09/97 at 12:03:08
From: Motts Parrinello
Subject: Distance in miles between longitude degrees at the equator

Dear Dr. Math,

What is the distance in miles between degrees of longitude at the
equator ?

Is it the circumference of the earth divided by 360 degrees?
If so, how do I find the circumference or diameter so I can
multiply by 3.14 ?

Thank you,

Motts Parrinello
```

```
Date: 09/09/97 at 12:57:36
From: Doctor Rob
Subject: Re: Distance in miles between longitude degrees at the
equator

Yes, it is the circumference of the Earth divided by 360.
The answer is exactly 60 nautical miles, by definition.

69.04663 miles. Multiply by 360 to get the circumference of the earth,
then divide by Pi to get the diameter, and divide again by 2 to get

-Doctor Rob,  The Math Forum
Check out our web site!  http://mathforum.org/dr.math/
```
Associated Topics:
High School Conic Sections/Circles
High School Geometry
High School Higher-Dimensional Geometry

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