Answer:
Step-by-step explanation:
The diagonals of a rhombus bisect each other at right angles, and they bisect the vertex angles of the rhombus. Opposite angles of the rhombus are congruent. That means ...
∠1 = 90°
∠4 = ∠5 = 48°
∠2 = ∠3 = 90° -48° = 42°