This is a complete lesson on cyclic quadrilaterals that will teach students to prove and use the rule that opposite angles in a cyclic quadrilateral add up to 180 degrees. The lesson is designed with the new GCSE specification in mind.

### Lesson Objectives

- To be able to prove that opposite angles in cyclic quadrilaterals add up to 180 degrees.
- To solve problems involving cyclic quadrilaterals.

### Who is this Lesson For?

This pack is designed for GCSE higher tier students. It could also be used with high ability Key Stage 3 students.

### What is Included?

Included in this download are the following:

- Full lesson plan for the ‘Cyclic Quadrilaterals’ lesson, including introduction, teaching content, individual activities, plenary and suggested support and extension activities
- Cyclic Quadrilaterals Demonstration
- Cyclic Quadrilaterals Example
- Mini-Plenary
- Student Worksheet on Cyclic Quadrilaterals
- Circle Theorems Fact Sheet
- Complete Solutions to all Questions

### Lesson Progression

This is the fifth lesson in the Circle Theorems unit of work (the unit is also **available as a pack** including homework activities and a unit assessment).

The other lessons in the unit are: