Know that the angles on a straight line sum to 180 degrees and use this to solve problems
I know that the angles on a straight line sum to 180 degrees and use this to solve problems.
Know that the angles on a straight line sum to 180 degrees and use this to solve problems
I know that the angles on a straight line sum to 180 degrees and use this to solve problems.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Angles on a straight line have a sum of 180 degrees.
- To calculate missing angles you can use addition and subtraction.
- Use mental or written strategies to calculate with angles up to 180 degrees.
Keywords
Sum - The sum is the result of adding two or more numbers.
Opposite - If something is opposite, it is placed on the other side.
Common misconception
Pupils think that the angles on a straight line only applied to lines that are horizontal.
Ensure pupils are exposed to straight lines in a range of orientations, encouraging them to draw on the 180 degree angle and how this can apply to both sides of the straight line.
To help you plan your year 5 maths lesson on: Know that the angles on a straight line sum to 180 degrees and use this to solve problems, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 5 maths lesson on: Know that the angles on a straight line sum to 180 degrees and use this to solve problems, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Angles: compare, name, estimate and measure angles unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Starter quiz
6 Questions





Exit quiz
6 Questions





