Introducing Angles in a Quadrilateral

Introducing Angles in a Quadrilateral
Introducing Angles in a Quadrilateral
Introducing Angles in a Quadrilateral

What's Included

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

Introducing Angles in a Quadrilateral

Students are introduced to angles in a quadrilateral by investigating how they are formed from two triangles.  More able students learn how to prove this property using algebra.
Differentiated Learning Objectives
  • All students should be able to calculate a missing angle in a scalene quadrilateral.
  • Most students should be able to calculate missing angles using the unique properties of each quadrilateral.
  • Some students should be able to prove the sum of the angles in a quadrilateral.
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

Mr Mathematics Blog

How to Simplify Surds

When learning how to simplify surds students need to understand the difference between a rational and irrational number. Rational numbers include integers and terminating and repeating decimals. They can be written as a fraction with both the numerator and denominator as integers. An irrational number is a number which, in its decimal form does not […]

Sharing an Amount to a Given Ratio

There are three common methods for sharing an amount to a given ratio.  Depending on the age group and ability range I am teaching I would choose one approach over the other two. The three methods are: Using fractions Unitary method Using a table In this blog I will demonstrate each of the three methods […]

Plotting Scatter Graphs and Understanding Correlation

To introduce plotting scatter graphs and understanding correlation I ask students to think about the relationships between different variables and to describe how they might be related. Here’s my starter activity which students discuss in pairs then present to me on mini-whiteboards. When the students have had time to discuss the matching pairs we talk […]