100 points for whoever can prove this geometry problem

Let the chord- part of VC inside smaller circle be a, and same of CU be b.

According to intersecting secants theorem we have:

and

From the second equation we get:

From the first equation we get:

substitute this into the second equation:

Proved

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

so what is the problem what are they asking you to solve

step-by-step explanation:

so what is the problem what are they asking you to solve