Know that the angles on a straight line sum to 180 degrees and use this to solve problems

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

The image is not to scale. What is the value of missing angle a? a = {{ }}°

The image is not to scale. What is the value of missing angle p? p = {{ }}°

The image is not to scale. What is the value of missing angle c? c = {{ }}°

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

It is 2 o’clock. Imagine the clock now shows half past two. How has the minute hand turned?

The image is not to scale. The image shows part of a right angle. What is needed to complete the right angle? {{ }}°

What is the missing value in this bar model? {{ }}°

This lesson will soon be taken down.

Know that the angles on a straight line sum to 180 degrees and use this to solve problems

Lesson outcome