Pythagoras' Theorem & Trigonometry - Complete Unit of Work

Grade Levels
7th - 10th
Formats Included
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45 pages
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In this unit, students will learn about finding unknown sides and angles in right angled triangles by using Pythagoras’ Theorem and trigonometry. They will start by learning Pythagoras’ Theorem (including a proof) and then use this to find an unknown hypotenuse, unknown shorter sides and apply the method to solve worded problems. Students will then learn the trigonometric ratios of sin, cos and tan and use these to find unknown sides and angles, and again apply this to solving problems.


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:

- Pythagoras’ Theorem
- Finding Shorter Sides Using Pythagoras
- Solving Problems Using Pythagoras
- Introduction to Trigonometry
- Finding Unknown Sides Using Trigonometry
- Finding Unknown Angles Using Trigonometry
- Using Trigonometry to Solve Problems

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 in this unit of work.
Total Pages
45 pages
Answer Key
Teaching Duration
2 Weeks
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