Question

Which polygon has an angle of rotation of 180 degrees?

Answer 1

nota

Answer 2

?

Answer 3

polygon 3

Answer 4

polygon 1 can only be folded in half and have the same shape (the word has escaped my mind, might be reflection, but that doesn't sound right)
polygon 2 can do it 5 times
polygon 3 can do it 2 times
and polygon 4 can do it 6 times

to find the angle of rotation, you just divide 360 by the number of times. 360/2 = 180

Answer 5

eh, not folded...i can't remember the word