Perimeter

There are 39 NRICH Mathematical resources connected to Perimeter
Perimeter Expressions
problem
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Perimeter expressions

Age
11 to 14
Challenge level
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Create some shapes by combining two or more rectangles. What can you say about the areas and perimeters of the shapes you can make?
Shapes on the Playground
problem
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Shapes on the playground

Age
7 to 11
Challenge level
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Sally and Ben were drawing shapes in chalk on the school playground. Can you work out what shapes each of them drew using the clues?
Pick's Theorem
problem
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Pick's theorem

Age
14 to 16
Challenge level
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Polygons drawn on square dotty paper have dots on their perimeter (p) and often internal (i) ones as well. Find a relationship between p, i and the area of the polygons.
On the Edge
problem
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On the edge

Age
11 to 14
Challenge level
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If you move the tiles around, can you make squares with different coloured edges?
Warmsnug Double Glazing
problem
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Warmsnug double glazing

Age
14 to 16
Challenge level
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How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?
Sizing them Up
problem
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Sizing them up

Age
5 to 7
Challenge level
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Can you put these shapes in order of size? Start with the smallest.

Rod Area
problem

Rod area

Age
7 to 11
This task challenges you to create symmetrical U shapes out of rods and find their areas.
Polydron
problem

Polydron

Age
7 to 11
Challenge level
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This activity investigates how you might make squares and pentominoes from Polydron.
Contact
problem

Contact

Age
14 to 16
Challenge level
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A circular plate rolls in contact with the sides of a rectangular tray. How much of its circumference comes into contact with the sides of the tray when it rolls around one circuit?