How to figure a...

I think I found it

R=((x/2)squared + h squared)/2h

Where x is the width and h is height.

That equation wont work without the measurments of the full circle. Start with finding where your circle will start and end on the rails from those points find the angle between themso say it was 100 degrees now divide 360 by that angle so 360/100 is 3.6. now measure along the rail the distance between those two points so if it is 5" take 5x3.6 and that is the curcumference. Take that number which is 18 and divide it by 3.14, which is 5.73 which is the diameter and divide that by 2 to get the radius.

Hope this helps... it is hard to measure a radius without a full or half circle. That is what three years of college math gets me.

Justin

Thanks, I'll try that.

It's been so long since I've used my math I can't remember it anymore, and my daughter used my notes for a coloring book.

No problem.. I know what you mean one semester is long enough for me to forget how to do it. That one took my awhile. Just let me know if you need me to clarify anything.

I started going back to school for engineering but with kids and a full time job I just couldn't keep up.

So jlow how do I find the degrees btw the points on the start and stop of the circle?

use a protractor line one point up on the zero and the other point should land on the degree of that angle.

DUH, brain fart.

So have you figured out what the radius is yet?

Ya, both formulas come out with the same answer.