There is exactly one reflection and no rotation that sends the convex quadrilateral abcd onto itself. what shape(s) could quadrilateral abcd be? explain. blank #1: shape blank #2: explanation blank # 1 blank # 2 by what angle x, where x < 180°, should an equilateral triangle be rotated clockwise about its center so that it carries onto itself?which statement is true about parallelograms? a. a parallelogram reflected across one of its diagonals is carried onto itself if its adjacent sides are congruent. b. a parallelogram reflected across a line segment joining the midpoints of its opposite sides is carried onto itself. c. a parallelogram reflected across a line segment joining the midpoints of its opposite sides is carried onto itself if its opposite sides are congruent. d. a parallelogram reflected across one of its diagonals is always carried onto itself. what is the smallest value of an angle, x, by which a regular pentagon should be rotated about its center so that it carries onto itself? a. 60° b. 72° c. 90° d. 360°