Diode circuit giving me problems

[JamesCA]

Diode circuit giving me problems [SOLVED]

I have this diode circuit giving me problems. What i dont understand is why Ir2 = Id1.

I have the circuit, and i have the solution. Any help would be awsome.

Just saw why,I can't delete this post. Thanks tho

 

[(*steve*)]

Unless you're told that, you can't know it.

You would have to show us the entire question.