Magnitude of Symmetry Question------ PLEASE HELP ME

[Riot]

I don't understand! I'm about to cry...

Shown below is an artist's rendition of what Stonehenge, a famous archaelogical site in England, would have looked like before the stones fell or were removed. What is the order & magnitude of symmetry for the outer ring?
30; 12 degrees
33; 11 degrees
33; 12 degrees
33; 10 degrees

 

[pappus]

I don't understand! I'm about to cry...

Shown below is an artist's rendition of what Stonehenge, a famous archaelogical site in England, would have looked like before the stones fell or were removed. What is the order & magnitude of symmetry for the outer ring?
30; 12 degrees
33; 11 degrees
33; 12 degrees
33; 10 degrees


View attachment 2006

Have a look here: http://www.mathsisfun.com/geometry/symmetry-rotational.html

and then start counting!

 

[Riot]

Confused

I don't understand, what am I suppose to be counting?

 

[pappus]

I don't understand, what am I suppose to be counting?

How many stones form the outer ring? How many degrees do you have to turn the outer ring until you get the exact image of the outer ing again?

 

[Riot]

Have a look here: http://www.mathsisfun.com/geometry/symmetry-rotational.html

and then start counting!

Thanks I guessed and got it right the 2nd time ^_^

 

[Riot]

Well yes I am a Riot lol