一條中一英文數學問題

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
(a) Which letters are both reflectional and rotational symmetric
besides those of order 1?


反射對稱&旋轉對稱(不包括1次旋轉對稱):

H I O X

(b) Which letters have two axes of symmetry?

兩個對稱軸:

H I X
(c) Which letters are rotational symmetric besides those of order 1 but
not reflectional symmetric?


旋轉對稱(不包括1次旋轉對稱),但並非反射對稱:

N S Z
(d) Which letters are reflectional symmetric but not rotational
symmetric of order 2 or above?

反射對稱但並非旋轉對稱(不包括1次旋轉對稱):

A M T U V W Y

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

(a) Which letters are both reflectional and rotational symmetric
besides those of order 1?


反射對稱&旋轉對稱(不包括1次旋轉對稱):

H I O X


(b) Which letters have two axes of symmetry?

兩個對稱軸:

H I X

(c) Which letters are rotational symmetric besides those of order 1 but
not reflectional symmetric?


旋轉對稱(不包括1次旋轉對稱),但並非反射對稱:

N S Z

(d) Which letters are reflectional symmetric but not rotational
symmetric of order 2 or above?

反射對稱但並非旋轉對稱(不包括1次旋轉對稱):
A M T U V W Y

Hope these can help you!