Which is true? a 4.02 > 4.1 b 4.181 < 4.118 c 4.5 > 4.49 d 4.665 > 4.67

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

Me i’m stuck on all these questions besides the two bottom ones

What is the length of ac in the given triangle?