Shaping up for Maths

Exploring and investigating in maths is always more fun when you can use your hands and get creative.

We were finding out how many different nets we could makeĀ for various 3D shapes. We used different materials to make our nets.

It was also a good way to check the properties of the 3D shapes:

  • We looked at the edges, where two faces meet
  • We counted the vertexes, where the corners meet
  • We counted the faces, the flat or curved surfaces

We even created some unusual shapes with many sides like the pentagonal dodecahedron

and the triangular pyramid prism,

Can you imagine what those two shapes look like?

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Transformation and Symmetry in Shapes








I learnt that there are mathematical terms for flip=reflection, slide=translation, turn=rotation and zoom=enlargement.

Today I learnt that when a shape is rotated it can go in a clockwise direction in 180 degrees. So our angles helped us to rotate shapes.

Symmetry is a mirror image which is relective symmetry. There is also rotational symmetry which is when there is more than one line of symmetrical when the shape is turned.

I discovered that ASYMMETRICAL means that a shape has no lines of symmetrical. Reflective symmetry is one line of symmetry in a shape. Rotational symmetry is in shapes that have more than one line of symmetry like in a star, circle or octagon.

Investigating 3D shapes

Today we completed our investigations of the features and characteristics of 3D shapes. We know that the points are called vertices and the edges are where two faces meet. The smooth flat surface is a face. When you open a shape out you can see its net. We enjoyed looking at the various 2D shapes of the nets and making our own shapes from nets.
Maths was more like art today when we used coloured icy pole sticks and blu tac to create our own 3D shapes. We studied the shapes from different perspectives and drew them. We even made shapes, using our bodies. We know that the 3 dimensions are height, width and length.
Do you know any other cool facts about 3D shapes?

Investigating 3D shapes from vgridley on Vimeo.