Sketch diagrams showing the positions of all the planes of symmetry of a T-shaped prism

Why is an isometric grid more appropriate for drawing $3\mathrm{D}$ shapes than a square grid?

Complete the drawing of the cuboid on triangular dotty paper. The dimensions of the cuboid are $2 \mathrm{cm}$ by $4 \mathrm{cm}$ by $1 \mathrm{cm}$.

Complete the drawing of the cuboid on triangular dotty paper. The dimensions of the cuboid are $3 \mathrm{cm}$ by $3 \mathrm{cm}$ by $2 \mathrm{cm}$.

The diagram shows a prism made from centimetre cubes. How many is the cubes is the prism made of?

The diagram shows a prism made from centimetre cubes. How many is the cubes is the prism made of?

The diagram shows a prism made from centimetre cubes. How many is the cubes is the prism made of?

The diagram is made of six cubes. Write down the smallest number of cubes that could be added to the diagram to make it into a cuboid.