Which of the following plane figures have reflectional symmetry?
下列哪些平面图形具有反射对称性质?
英语百科
Geometric shape
(重定向自Plane figure)
A geometric shape is the geometric information which remains when location, scale, orientation and reflection are removed from the description of a geometric object. That is, the result of moving a shape around, enlarging it, rotating it, or reflecting it in a mirror is the same shape as the original, and not a distinct shape.