There are three elements of symmetry:
1-axis of symmetry
It's a line which cuts the molecule into two equal halves.
2-plane of symmetry
It's a plane which cuts the molecule into two equal halves (such as 'axis of symmetry' but axis is a line and here it's a plane).
3-center of symmetry
It's a point in space that, if you draw a line from any part to it, and then extend the line beyond it, another atom will be encountered.
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Symmetry is a balance or harmonious arrangement of parts on either side of an axis or plane. Plane symmetry refers to symmetry in a two-dimensional plane where an object can be reflected across a line to produce an identical shape. This concept is commonly seen in objects like snowflakes or geometric figures.
An eel has bilateral symmetry, meaning that its body can be divided into two identical halves along a single plane. This symmetry allows an eel to be streamlined and efficient in its movement through the water.
Zebras exhibit bilateral symmetry, meaning they can be divided into two equal halves along a vertical plane running from head to tail. This symmetry allows for balanced movement and coordination in their body structure.
Squirrels, like all vertebrates, have bilateral symmetry. This means they have symmetry across one plane (known as the sagittal plane, and directly down the centre of their body), which means one side of their body approximately mirrors the other side.
Penguins, like all vertebrates, have bilateral symmetry. This means they have symmetry across one plane (known as the sagittal plane, and directly down the centre of their body), which means one side of their body approximately mirrors the other side.
An ape has bilateral symmetry, which means that its body can be divided into two mirror-image halves along a single plane. Radial symmetry, on the other hand, is typically found in animals like jellyfish or sea anemones where multiple planes of symmetry can be drawn through a central axis.