(a) The given figure has its rotational symmetry as 4.
(b) The given figure has its rotational symmetry as 3.
(c) The given figure has its rotational symmetry as 1.
(d) The given figure has its rotational symmetry as 2.
(e) The given figure has its rotational symmetry as 3.
(f) The given figure has its rotational symmetry as 4.
Hence, figures (a), (b), (d), (e), and (f) have rotational symmetry of order more than 1.
An object is said to have an n-fold rotational symmetry if the object, rotated by an angle of \( \frac{2\pi}{n} \), is identical to the original.
Which one of the following objects exhibits 4-fold rotational symmetry about an axis perpendicular to the plane of the screen?
Write equations for the following statements:
(i) The sum of numbers x and 4 is 9.
(ii) 2 subtracted from y is 8.
(iii) Ten times a is 70.
(iv) The number b divided by 5 gives 6.
(v) Three-fourth of t is 15.
(vi) Seven times m plus 7 gets you 77.
(vii) One-fourth of a number x minus 4 gives 4.
(viii) If you take away 6 from 6 times y, you get 60.
(ix) If you add 3 to one-third of z, you get 30