Introducing Angles on a Straight Line

Introducing Angles in a Triangle
Introducing Angles on a Straight Line
Introducing Angles on a Straight Line

What's Included

  • Smart Notebooks Presentation
  • Activ Inspire Flipchart
  • Lesson Plan
  • Microsoft PowerPoint Presentation
  • Differentiated Worksheet

Introducing Angles on a Straight Line

Using angles on a straight line have a sum of 180° students learn how to calculate missing angles and set up and solve simple equations this property.  More able students apply this to recognise and calculate vertically opposite angles.The start of the lesson recaps perpendicular angles.  In the main part students learn how to calculate missing angles on a straight line using the sum of 180°. The plenary challenges students to create a straight line out of three known angles.
Differentiated Learning Objectives
  • All students should be able to know the sum of the angles on a straight line is 180°.
  • Most students should be able to calculate vertically opposite angles and angles on a straight line.
  • Some students should be able to prove that vertically opposite angles are equal.
Lesson Downloads
Download Lesson Plan Download PowerPoint Download Notebook Download Flipchart Download Worksheet
Scheme of Work Link and Related Blogs
Angle Properties SoWGeometrical Reasoning in Key Stage 3 Blog
IMMEDIATE DOWNLOAD

Mr Mathematics Blog

Calculating Instantaneous Rates of Change

When calculating instantaneous rates of change students need to  visualise the properties of the gradient for a straight line graph.   I use the starter activity to see if they can match four graphs with their corresponding equations. The only clue is the direction and steepness of the red lines in relation to the blue line […]

Converting Between Fractions, Decimals and Percentages

Fractions, decimals and percentages are ways of showing a proportion of something.  Any fraction can be written as a decimal, and any decimal can be written as a percentage.  In this blog I discuss how to use the place value table and equivalent fractions to illustrate how fractions, decimals and percentages are connected. You can […]

Comparing Datasets using the Mean and Range

In my experience, students, in general, find the concept of a mean straightforward to calculate and understand. However, the mean alone does not provide a complete picture of a set of data. To achieve this, a measure of spread is also required. The range is the simplest measure that can be used for this. Not […]