Question

Question in the comments

Answer 1

look at the circles what is 42 divided by 2 then divided by 2

Answer 2

i do not know y u put that line nm because that is not the radius of the smallest circle

Answer 3

How far have you gotten?

If R is the radius of the two midsize twins, ½AO and ½OB.
If r is the radius of the two small guys, DN.
If Q is the midpoint of OB.
Construct segment QN.
That looks an awful lot like an isosceles triangle with base MQ (2R) and height ON and matching sides (R+r).

No?

Quite a bit of information. Surely, it leads somewhere.

Answer 4

I know how to solve these problems. I put them for people to practice.

Answer 5

I figured. I left out one important piece in my little solution. :-)