# There are 366 different Starters of The Day, many to choose from. You will find below some starters on the topic of Shape (3D). A lesson starter does not have to be on the same topic as the main part of the lesson or the topic of the previous lesson. It is often very useful to revise or explore other concepts by using a starter based on a totally different area of Mathematics.

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### Shape (3D) Starters: Determine whether the given nets would fold to produce a dice. A dice is reflected in two mirrors. What numbers can be seen? Find the number of faces, edges and vertices on some familiar objects. How many triangles are there on the surface of a regular icosahedron.

## Exercises #### 3D Trigonometry Presentation

A slide presentation (a poem) introducing using trigonometry (including Pythagoras' Theorem) to find lengths and angles on three dimensional shapes. #### Coloured Cube 3D

Colour in the remaining faces of the nets of the cubes to match the rotating three-dimensional picture. #### Cube Construction

This is a simple interactive that does nothing more than allow you to create 3D drawings of models made with cubes. #### Cube Face Meetings

Visualise the cubes formed by the nets and paint the three faces meeting at a vertex. #### Cubical Net Challenge

Find all the ways of painting the faces of cubes using only two colours. #### Cylinders

Apply formulae for the volumes and surface areas of cylinders to answer a wide variety of questions #### Dice Net Challenge

Drag the numbers onto the net so that when it is folded to form a cube numbers on opposite faces add up to prime numbers. #### Drawing 3D Objects

Draw two-dimensional representations of three-dimensional objects on an isometric dotty grid. #### Faces, Edges and Vertices

Calculate the number of faces, edges and vertices on 3D Shapes. #### Net or Not

Drag the nets into the corresponding panels to show whether they would fold to form a cube. #### Plans and Elevations

Interpret plans and elevations of three dimensional shapes. #### Puzzle Cube Net

A jumbled moving-block puzzle cube is shown as a net. Can you solve it? #### Similar Shapes

Questions about the scale factors of lengths, areas and volumes of similar shapes. #### Surface Area

Work out the surface areas of common solid shapes in this collection of exercises. #### The Great Dodecahedron

Pupils are not allowed to use their hands to point but must describe fully any shapes they can see in this picture. #### Trigonometry in 3D

Calculate the lengths of sides and the size of angles in three dimensional shapes. #### Volume

Use formulae to solve problems involving the volumes of cuboids, cones, pyramids, prisms and composite solids. #### Volume Equals Surface Area

Find the cuboids with integer side lengths where the volume is numerically equal to the surface area. #### Yes No Questions

A game to determine the mathematical item by asking questions that can only be answered yes or no.

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