2D Shapes - Rectangles, Area
Key Stage: 2 ★
Jason's class tore some pieces out of their rectangles and pairs of joined rectangles. Can you work out how many squares were in their shapes?
This problem is a good way to assess children's understanding of properties of rectangles. The problem is a nice lead into area, although this is not specifically mentioned in the wording. Torn Shapes is a challenge that encourages children to adopt a different technique for finding area rather than simply counting squares.
This resource has comprehensive teachers' notes and resources, linked from the problem page. This includes possible approaches and key questions, as well as possible support and extensions.
The file attached is a HTML file, which, when opened, automatically redirects you to the problem on the NRICH website.
Key Stage: 2 ★
Jason's class tore some pieces out of their rectangles and pairs of joined rectangles. Can you work out how many squares were in their shapes?
This problem is a good way to assess children's understanding of properties of rectangles. The problem is a nice lead into area, although this is not specifically mentioned in the wording. Torn Shapes is a challenge that encourages children to adopt a different technique for finding area rather than simply counting squares.
This resource has comprehensive teachers' notes and resources, linked from the problem page. This includes possible approaches and key questions, as well as possible support and extensions.
The file attached is a HTML file, which, when opened, automatically redirects you to the problem on the NRICH website.
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Used in lesson which supported the children learning.
An activity from the nrich website which presents children with rectangles and compond shape, made from two rectangles, drawn on cm squared paper, with parts 'torn' from them. Children are asked to say how many cm squares are missing from each shape. A useful activity to link to visual representations of multiplication facts, and I would probably use as a starter or plenary activity. The shapes can be seen on the web page, or printed from the PDF document.
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