Look in ~ the shapes below. The symmetry of the shape on the left and its partnership to the shape on the right deserve to be thought of in two ways:

Fold the left-hand shape along the central line. Climate one side lies precisely on height of the other, and also gives the form on the right.

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Imagine a mirror put along the main dotted line. The reflection in the mirror gives the other half of the shape.

The dashed lines stand for lines the symmetry, and also each form is said to it is in **symmetrical** around this line.

The following all have actually line symmetry:

A shape can have more than one line of symmetry. Therefore a rectangle has two lines of symmetry, an it is intended triangle has actually three present of symmetry, and also a square has four.

A circle has actually an infinite variety of lines the symmetry because it can be folded around any diameter. Only eight that the possible lines of the opposite are indicated below.

Some shapes, such together a scalene triangle, have actually no currently of symmetry – that is not feasible to fold the shape around a heat so that the two halves fit precisely on height of one another.

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