Quick easy questionFormula for angular diameter?

[Soylentgreen]

i am looking for the equation for angular diameter in relation to an objects distance and diameter.
i need it expressed in arc seconds, not radians.

anyone know it?

 

[cesiumfrog]

Can you draw a picture and do some trig?

 

[russ_watters]

An arcmin is 1/60th of a degree and an arcesc is 1/60th of an arcmin. Can you draw a picture now...?