19 A square is rotated about its center.
Select all of the angles of rotation that will map the square onto itself.
A 45 degrees
B60 degrees
C90 degrees
D120 degrees
E 180 degrees
F 270 degrees

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220