Mammoth Memory

Symmetric

Symmetric – Identical parts facing each other. The simplest type is a mirror.

Picturing a metal tick viewed in a mirror helps you to remember that a symmetrical shape has identical parts facing each other

See metal tick (symmetric) with a mirror. (Mirrors always provide a symmetrical view in reflection.)

 

Example 1

 

A circle is an example of a symmetrical shape as it's symmetrical through any line that divides it perfectly in half

A circle is symmetrical through any line that divides it perfectly in half.

 

Example 2

A rectangle is symmetrical about a vertical line through the centre, and a horizontal line through the centre

A rectangle is symmetrical about a vertical line through the centre, and a horizontal line through the centre.

 

Example 3

This equilateral triangle is symmetrical about the vertical line passing through its centre

This triangle is symmetrical about the vertical line passing through its centre.

 

 

Example 4

This drawing of a plane shape is symmetrical about the red line centre line that passes through the middle of the planes fuselage

This plane shape is symmetrical about the red line that passes through it. 

 

Example 5

These two wavey lines are symmetrical along the dotted red centre line that passes between them

Lines such as the ones above or those on a graph may also be symmetrical.

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