Transformation and symmetry

Transformations are changes in position or size of a shape.

The study of transformations in this section focus on translations or slides, reflections or flips, and rotation or turns. Line symmetry and Rotational symmetry will also be discussed.

Symmetry

If you fold a shape in half, where the two halves match then the image is said to have line symmetry or mirror symmetry. This folded line is a line of reflection.

Term: Symmetry: Exact similar part facing each other.

Observe the following pictures carefully and determine the lines of symmetry.

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IDENTIFY THE LINES OF SYMMETRY

First determine if the shape has any lines of symmetry. Imagine the shape is folded along a line that makes the image into two equal parts.

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The line of symmetry is drawn broken. Sometimes, a shape has more than one line of symmetry.

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Be careful where you draw your line symmetry.

On a sheet, if they were folded, the equal parts would overlap. The parts are symmetrical. This is the first line of symmetry.

WORKSHEETS

Symmetry Worksheet 1

Symmetry Worksheet 2