Subject :IMO Class : Class 7
A windmill has four blades and rotational symmetry of the order 2 × K . Find K .
A 1
B 2
C 3
D 4
Number of symmetrical lines are 4 Therefore 4 will be equal to 4*K
Ans 1:
Class : Class 10
THERE ARE 4 LINES OF ROTATIONAL SYMMETRY.BUT THERE IT IS ASKED THAT WHAT IS THE VALUE OF 2*K.WE KNOW THAT 2*K IS TOTAL NUMBER OF ROTATIONAL SYMMETRY.SO:-
2*K=4
K=4/2
K=2