posted by vaishnavi .
i need help with this geometry prblem
my math book is online on this site:
w w w . k e y m a t h . com / D G 3
the class passcode is: 1574-4c524
The chapter is 0
problem number 6
REMEMBER 4-FOLD SYMMENTRY IS NEEDED !!!
The question requires 4-fold rotational symmetry.
In a fan with 4 blades, it exhibits 4-fold rotational symmetry. Each blade when turned 90° coincides with the next blade.