Representing 3D shapes in 2D | Maths | Quizalize & Oak National Academy

Starter quiz

If one shape can fit exactly on top of another using rotation, reflection or translation, then the shapes are __________.

'congruent' ✓
What is the length of BC?

11 cm

18 cm ✓

20 cm
The image is a 2D representation of a 3D shape. What is the shape?

cube

cuboid

cone

cylinder ✓

sphere
The image is a 2D representation of a 3D shape. What is the shape?

cube

cuboid

cone ✓

cylinder

sphere
The image is a 2D representation of a 3D shape. The shape is a ______.

'cuboid' ✓
Jacob has got his pair of compasses ready to draw a circle. Which statements will be true?

The radius will be 4 cm.

The radius will be 8 cm. ✓

The radius will be 16 cm.

The diameter will be 8 cm.

The diameter will be 16 cm. ✓

______ paper contains dots or points which are all equally spaced, such as in the diagram.

'isometric' ✓
The image shows a photograph and an isometric drawing of a pencil sharpener. The value of $a$ is ______.

'1' ✓
The image shows a photograph and an isometric drawing of a pencil sharpener. The value of $c$ is ______.

'2' ✓
The image shows a solid that is constructed with two congruent cuboids and an isometric drawing of the solid. The value of $a$ is ______.

'2' ✓
The image shows a solid that is constructed with two congruent cuboids and an isometric drawing of the solid. The value of $d$ is ______.

'3' ✓
Which isometric drawing shows a cuboid with lengths 2 units, 3 units and 5 units?

a

b

c

d ✓

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Pupils count all the triangles in a row to determine length rather than only counting the ones which have an edge on the line.

Encourage pupils to consider what they are using to measure when they draw each line on isometric paper.

Isometric paper - Isometric means distances between points stay the same. In this lesson we use isometric paper which has equally spaced dots or points.
Solid - A solid is a shape that has three dimensions (e.g. width, height and depth).