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Circle Theorems - Complete Unit of Work

Grade Levels
7th - 10th
Formats Included
  • Zip
43 pages
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In this unit, students will use circle theorems to solve angle problems. They will learn how to prove and use the facts that the angle in a semi-circle is 90°, that the angle formed at the centre of a circle is double the angle formed on the circumference, that angles in the same segment are equal, that a perpendicular from the centre of a circle to a chord bisects the chord, that opposite angles in cyclic quadrilaterals are equal, that a tangent and a radius make a right angle, that two tangents from a point are equal and that the angle between a chord and a tangent is equal to the angle in the alternate segment.


This pack is designed to provide teachers with complete lesson plans and classroom resources to teach excellent lessons. It is designed to both teach the mathematical content and draw students into deeper consideration of its implications, including mathematical reasoning and problem solving skills.


7 Lesson Plans: Full ready-to-use lesson plans on the following topics:

Angles in a Semi-Circle
Angles at Centre & Circumference
Angles in Same Segment
Chord Properties
Cyclic Quadrilaterals
Tangent Properties
Alternate Segment Theorem
Lesson Resources: A variety of additional resources to accompany the lesson plans, including student worksheets and aids for students needing extra support.

2 Homework Activities: Further activities to give students to complete at home.

Assessment: A series of questions to enable you to assess the progress of students.
Total Pages
43 pages
Answer Key
Teaching Duration
2 Weeks
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