Answer Happy

b. Equilateral triangle Choose the correct answer below. O A. Rotation about the point of intersection of the perpendicular bisectors of the sides by any turn angle in either direction OB. Rotation by exactly about any vertex in either direction (Simplify your answer. Use integers or fractions for any numbers in the expression.) OC. Rotation by any integer multiple of about the point of intersection of the perpendicular bisectors of the sides in either direction (Simplify your answer. Use integers or fractions for any numbers in the expression.) D. Rotation by any integer multiple of about any vertex in either direction (Simplify your answer. Use integers or fractions for any numbers in the expression.) O E. Rotation by exactly about the point of intersection of the perpendicular bisectors of the sides in either direction (Simplify your answer. Use integers or fractions for any numbers in the expression.) OF. Rotation about any vertex by any turn angle in either direction O G. No rotational symmetries, other than the identity symmetry
c. A square with equilateral triangles on its sides as shown 4 Choose the correct answer below. A. Rotation about the intersection of the diagonals by any turn angle clockwise only B. Rotation by exactly about the intersection of the diagonals in either direction (Simplify your answer. Use integers or fractions for any numbers in the expression.) C. Rotation about the intersection of the diagonals by any turn angle in either direction OD. Rotation by exactly about the intersection of the diagonals clockwise only (Simplify your answer. Use integers or fractions for any numbers in the expression.) E. Rotation by any integer multiple of about the intersection of the diagonals in either direction (Simplify your answer. Use integers or fractions for any numbers in the expression.) F. Rotation by any integer multiple of about the intersection of the diagonals clockwise only (Simplify your answer. Use integers or fractions for any numbers in the expression.) G. No rotational symmetries, other than the identity symmetry
d. Half a circle with its diameter Choose the correct answer below. A. Rotation about the top of the semicircle by any turn angle counterclockwise only B. Rotation by any integer multiple of about the midpoint of the diameter clockwise only (Simplify your answer. Use integers or fractions for any numbers in the expression.) C. Rotation by any integer multiple of about the top of the semicircle counterclockwise only (Simplify your answer. Use integers or fractions for any numbers in the expression.) D. Rotation by exactly about the top of the semicircle counterclockwise only (Simplify your answer. Use integers or fractions for any numbers in the expression.) O E. Rotation by exactly about the midpoint of the diameter clockwise only (Simplify your answer. Use integers or fractions for any numbers in the expression.) OF. Rotation about the midpoint of the diameter by any turn angle clockwise only O G. No rotational symmetries, other than the identity symmetry
e. Circle with an inscribed rectangle that is not a square Choose the correct answer below. O A. Rotation by exactly about any vertex of the rectangle counterclockwise only (Simplify your answer. Use integers or fractions for any numbers in the expression.) OB. Rotation by exactly about the center of the circle in either direction (Simplify your answer. Use integers or fractions for any numbers in the expression.) O C. Rotation by any integer multiple of about any vertex of the rectangle counterclockwise only (Simplify your answer. Use integers or fractions for any numbers in the expression.) D. Rotation about the center of the circle by any turn angle in either direction O E. Rotation about any vertex of the rectangle by any turn angle counterclockwise only OF. Rotation by any integer multiple of about the center of the circle in either direction (Simplify your answer. Use integers or fractions for any numbers in the expression.) G. No rotational symmetries, other than the identity symmetry