Year 9 · Maths
Solve problems involving perimeters and areas of 2D shapes in Year 9 Maths
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Focus on circumference and area of a circle. Start with “Find the Areas of Circles Using Their Diameters”, then explain the idea in your own words.
Year 9 learners practise circumference and area of a circle.
The activities include Find the Areas of Circles Using Their Diameters, Find the Circumference and Area of a Circle, Find the Perimeter of Part Circles, and related practice. The checked support below includes video, worksheet, teaching. Open a resource in its provider's website and choose the format that best helps the learner explain the idea independently.
Activities covered
- Find the Areas of Circles Using Their Diameters
- Find the Circumference and Area of a Circle
- Find the Perimeter of Part Circles
- Find the Radius of a Circle From Its Area
- Revise Similar Triangles
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Start with an explanation, then practise, then print. Labels show access and review status before you click.
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Watch — a video of a teacher explaining it
Learn — a lesson or teaching page to read and work through
Practise — questions or activities to try
Print — a worksheet you can print, usually with answers
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Oak National Academy, BBC Bitesize, Corbettmaths and Mathsframe normally open with no account. Twinkl access varies by resource, so we only show a free label after checking the resource's own page. Unconfirmed access appears only under Everything.
Watch it explained
a teacher walks through it
Using the formula for the area of a circle
Best for: a clear explanation before you practise
Multiplicative relationships in circles
Best for: a clear explanation before you practise
Circumference of a circle
Best for: a clear explanation before you practise
Similarity in shapes
Best for: a clear explanation before you practise
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Learn it properly
lessons and teaching pages
Perimeter, area and volume: lesson sequence
Best for: worked examples and step-by-step teaching
Geometrical properties: similarity and Pythagoras' theorem: lesson sequence
Best for: worked examples and step-by-step teaching
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Practise it
questions and activities to try
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Print and finish
worksheets away from the screen
Perimeter, Area, Volume
Best for: pencil-and-paper practice away from the screen
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