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It means literally if you reflected the object through the centre of the image, at a specific angle, in a mirror you would get the same image on the mirror with that on the other side.

So or example the letter A has one line of reflectional symmetry because if you put a mirror vertically along it, you would see the same image on the mirror as the side that you weren't looking at.

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Q: What does reflectional symmetry mean in math?
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Related questions

What is reflectional summetry?

Reflection symmetry, reflectional symmetry, line symmetry, mirror symmetry, mirror-image symmetry, or bilateral symmetry is symmetry with respect to reflection


Does a hexagon have both rotational and reflectional symmetry?

Yes it does. A regular hexagon will have both rotational and reflectional symmetry about its centre.


What does it mean for a shape to not have either rotational and reflectional symmetry?

Simply that it is an asymmetric shape.


Is france's flag reflectional rotational or both in symmetry?

Reflectional only.Reflectional only.Reflectional only.Reflectional only.


An object with reflectional symmetry can be created by rotating it about an axis called the?

Line of symmetry


An equilateral triangle has reflectional symmetry but does not have rotational symmetry?

It does have rotational symmetry of order three.


A quadrilateral that has reflectional symmetry but not rotational symmetry?

A isosceles trapezoid for example.


Does a regular pentagon have reflectional symmetry?

Yes a pentagon does have reflection symmetry


Is a rhombus rotational or reflectional symmetry?

both


What is a horizontal reflectional symmetry word?

BED


What is the definition of reflectional symmetry?

An image has Reflectional Symmetry if there is at least one line which splits the image in half so that one side is the mirror image of the other. Reflectional symmetry is also called line symmetry or mirror symmetry because there is a line in the figure where a mirror could be placed, and the figure would look the same.


What is one phrase that has reflectional symmetry when written horizontally?

One phrase that has reflectional symmetry when written horizontally is "Too hot to hoot."