Chapter 8.5, Problem 48E

(a)

To determine

To insert: The vertical line m such that the given figure has reflective symmetry about line m.

(b)

To determine

To check: The possibility to insert horizontal line l such that the given figure has reflective symmetry about line l.

(c)

To determine

To check: The possibility to insert a point P such that given figure has $90°$ rotational symmetry about point P.

(d)

To determine

To check: The possibility to insert a point P such that given figure has $180°$ rotational symmetry about point P.