If there are two circles with known position and radius, and one (the smaller one) is inside the other, how do I find the distance between their edges?

How would I find the length of the drawn line?

Darry Jul 26, 2021

#1**+1 **

Note that if the circles had the same center (concentric) , the value would be R1- R2

But R2 is moved a distance equal to the distance between C2 and C1 this reduces R1-R2 by this amount

So the line will be (R1-R2) - distance betweenC2 and C1 (sorry...that black R1 should be labelled R2)

ElectricPavlov Jul 26, 2021

#3**+3 **

Big circle radius => R

Small circle radius => r

Distance between the centers => m

? = n

**n = R - r - m**

civonamzuk Jul 26, 2021