Symmetry of shapes

This week in maths, the children have been exploring the lines of symmetry within shapes. They learned that if a mirror is placed on a line of symmetry, you will see a reflection that completes the original shape. If the mirror is not placed on a line of symmetry, the reflection will create a different shape. They explored this with plastic 2D shapes, and shapes drawn on paper. At the end of the investigation, they discovered that all regular shapes (same length sides and equal angles), have the same number of lines of symmetry as they do sides and vertices.  Irregular shapes, such as a rectangle, have only two lines of symmetry, and an isosceles triangle has only one. Other irregular shapes such as a parallelogram, do not have any lines of symmetry.

Article 28 – We all have the right to a good quality education.

 

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