Year 9 · Maths
Solve problems involving right-angled triangles in Year 9 Maths
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Focus on pythagoras theorem and right angled triangle trigonometry. Open support for “Calculate Side Lengths in Right-Angled Triangles Using Trigonometry”, then explain the idea in your own words.
Year 9 learners practise pythagoras theorem and right angled triangle trigonometry.
The activities include Calculate Side Lengths in Right-Angled Triangles Using Trigonometry, Find Missing Sides in Right-Angled Triangles Using Pythagoras’ Theorem, Find Side Lengths and Angles in Right-angled Triangles, and related practice. The checked support below includes video, worksheet, teaching, lesson. Open a resource in its provider's website and choose the format that best helps the learner explain the idea independently.
Activities covered
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- Calculate Side Lengths in Right-Angled Triangles Using Trigonometry — support from Oak National Academy
- Find Missing Sides in Right-Angled Triangles Using Pythagoras’ Theorem — support from Oak National Academy
- Find Side Lengths and Angles in Right-angled Triangles — support from YouTube — corbettmaths
- Find Side Lengths in Right-Angled Triangles Using Trigonometry — support from Oak National Academy
- Find the Angle Using Trigonometry — support from YouTube — corbettmaths
- Identify Right-Angled Triangles — support from Oak National Academy
- Identify the Sides of a Right-Angled Triangle — support from Oak National Academy
- Identify Trigonometric Ratios in Right-Angled Triangles — support from Oak National Academy
- Recognise the Correct Trigonometric Ratio — support from Oak National Academy
- Understand Pythagoras’ Theorem — support from Oak National Academy
- Use Pythagoras’ Theorem — support from Oak National Academy
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Watch it explained
watch a video explanation
Choosing an appropriate method for finding lengths of a triangle
Best for: a clear explanation before you practise
Problem solving with similarity and Pythagoras' theorem
Best for: a clear explanation before you practise
Trigonometry Missing Sides - Corbettmaths
Best for: a clear explanation before you practise
Trigonometry Missing Angles - Corbettmaths
Best for: a clear explanation before you practise
Checking and securing understanding of Pythagoras' theorem
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Determining which side
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Choosing the right trigonometric ratio
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Demonstrating Pythagoras' theorem
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Pythagoras' theorem in context
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Learn it properly
lessons and teaching pages
Trigonometry: lesson sequence
Best for: worked examples and step-by-step teaching
Geometrical properties: similarity and Pythagoras' theorem: lesson sequence
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Practise it
questions and activities to try
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Print and finish
worksheets away from the screen
Pythagoras and trigonometry
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Pythagoras Practice Questions
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