Clockwise is the direction that the hands of an analogue clock travel.

Anti-clockwise is the opposite direction to which the hands of an analogue clock travel.

The most common unit of measurement for angle. One whole turn is equal to 360 degrees, written 360°.

Describing a rotation's direction and size

Maths

In this unit, pupils explore the effects of different transformations and whether the transformed shape is congruent or similar to the original shape. This is built on in the future unit where pupils formalise the criteria for determining congruence in triangles and study rotational symmetry

In this unit, pupils translated and reflected simple shapes on the full coordinate grid. In this unit, these processes are formalised and rotation and enlargement are introduced

Transformations

In which direction is this object being rotated?

This arrow is currently pointing in the W (west) compass direction. If this arrow is rotated anti-clockwise, what is the first compass direction that it passes through?

Match the size an angle in degrees to its description.

Jun stands on the spot and rotates clockwise by a quarter turn, and then rotates clockwise by a further three-quarter turn. In total, how many degrees has Jun rotated by? {{ }}

Jun stands on the spot and rotates anti-clockwise by an angle between three-quarters of a full turn and one full turn. Which of these is a sensible answer for the size of Jun's rotation?

Which of these is a suitable description for this rotation?

In which direction will this car be facing when it is rotated so its wheels touch the road?

Which of these objects, when rotated by a quarter-turn, will fit into the space of this shape to complete a rectangle?

Complete this sentence: "When an object is rotated, the size of its angles are invariant. This means the lengths of the sides remain {{ }} ."

The object has been rotated to become its image.

The object has been translated to become its image.

The object has been reflected to become its image.

The object has been rotated by a full turn.

The object has been rotated by less than a full turn.

Sam transforms an object and its orientation has not changed. Which of these describes why the orientation has not changed?

Which of these is a rotation of this object? 

This lesson will soon be taken down.

Describing a rotation's direction and size

Lesson outcome