An angle is a measure of turn. It shows how far something has rotated.

A degree is a unit of measure for angles.

An arc is part of any curve. They can be used to show the angle between two lines.

Use the unit of degrees as a standard unit to measure angles

Maths

In this unit pupils will compare the size of angles where there is a clear visual difference and use the terms acute, obtuse and reflex when describing the size of angles or amount of rotation with relation to right angles using a unit called degrees. In the future unit pupils will use knowledge of shape properties to draw, sketch and identify shapes.

In the prior unit pupils completed and composed symmetrical shapes from two congruent shapes and investigate lines of symmetry in 2D shapes. In this unit pupils will compare the size of angles where there is a clear visual difference and use the terms acute, obtuse and reflex when describing the size of angles or amount of rotation with relation to right angles using a unit called degrees.

Angles: compare, name, estimate and measure angles

How many degrees are equal to one right angle? {{ }} °

A full turn is equal to four right angles which is ___.

The angle shown is 50° which means it is an {{ }} angle. 

The angle shown is 140° which means it is an {{ }} angle. 

What is the measurement of the angle shown here? {{ }}°

Which image shows an angle of approximately 30°?

Look at the image. This shape has {{ }} right angle(s).

This shape has one pair of parallel sides. True or false?

Complete the sentence. A rhombus has {{ }} vertices.

Look at the hands on this clock face and the arrow. The angle formed is __________.

This is a trapezium. Look carefully at the vertices and the angles inside the shape. Complete the sentence. There are {{ }} obtuse angles in the trapezium.

This lesson will soon be taken down.

Use the unit of degrees as a standard unit to measure angles

Lesson outcome