The true statements are
A. a rotation of 120° around the center, point d
B. a reflection across line c, through the midpoints of opposite sides
D. a reflection across line b, through one vertex, the center d
E. a rotation of 60° around the center, point d
What is rotation and reflection as used in transformation
A rotation is a transformation that turns a figure around a fixed point called the center of rotation
A rotation in steps of 60 degrees (60 120, 180...) about the center will carry the figure onto itself. This is achieved using the concept of rotational symmetry
A reflection is a transformation that flips a figure over a line called the line of reflection or mirror line.
Reflection alone the lines of symmetry will also carry the image onto itself