Question

problem 7 (problema 7)
select all the figures with 180 - degree rotation symmetry.
seleccione todas las figuras con simetría de rotación de 180 grados.
a
right, isosceles triangle
derecha, triángulo isósceles
b
rectangle
rectángulo
c
square
cuadrado
d
regular pentagon
pentágono regular
e
regular hexagon
hexágono regular

Explanation:

• A right isosceles triangle (A) has no 180° rotation symmetry.
• A rectangle (B) maps to itself when rotated 180°.
• A square (C) maps to itself when rotated 180°.
• A regular pentagon (D) has rotational symmetry of 72°, not 180°.
• A regular hexagon (E) maps to itself when rotated 180°.

Answer:

B. Rectangle, C. Square, E. Regular hexagon