Current
Area Intrigue
We usually measure area using a unit based on a square. In this feature, we invite you to explore area using triangular units, and see what relationships you can discover!
Isometric Areas Stage: 3 Challenge Level: 
We usually use squares to measure area, but what if we use triangles instead?
More Isometric Areas Stage: 3 Challenge Level:
Isometric Areas explored areas of parallelograms in triangular units. Here we explore areas of triangles...
Of All the Areas Stage: 4 Challenge Level:
Can you find a general rule for finding the areas of equilateral triangles drawn on an isometric grid?
Towering Trapeziums Stage: 4 Challenge Level:
Can you find the areas of the trapezia in this sequence?
Perimeter, Area and Volume Stage 3 - Short Problems Stage: 3
A collection of short Stage 3 problems on area and volume.
Perimeter, Area and Volume Stage 4 - Short Problems Stage: 4
A collection of short Stage 4 problems on area and volume.
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.