Answer:
The fibula articulates with:
The tibia, medially, via long stretch of connective tissue referred to as a syndesmosis.
The talus, inferiorly, via talofibular joint.
The fibula *does not* articulate with the patella / "knee cap" or femur. In addition, the fibula is not a weight-bearing structure (the tibia is the weight-bearing bone of the lower leg).