# Simple Earth Circumference Question!

1. Sep 19, 2009

### DaveMaron

Hello. This is my first post. I just started physics this year, and I forgot how to do some simple trigonometry, but I'm not quite sure where to look.

1. My question is: If I know the circumference of the Earth at the Equator is about 2.49 x 10 to the Fourth,

How do I find the Circumference of the Earth 45 Degrees North?

2. Relevant equations: None

3. None...

Obviously it would be smaller, but I'm not quite sure how much.

Thanks for the help.

2. Sep 19, 2009