Area - triangles, quadrilaterals, compound shapes

Investigate how the four L-shapes fit together to make an enlarged L-shape. You could explore this idea with other shapes too.

We usually use squares to measure area, but what if we use triangles instead?

It's easy to work out the areas of most squares that we meet, but what if they were tilted?

Draw some isosceles triangles with an area of $9$cm$^2$ and a vertex at (20,20). If all the vertices must have whole number coordinates, how many is it possible to draw?

What happens to the area and volume of 2D and 3D shapes when you enlarge them?

What are the possible areas of triangles drawn in a square?

We started drawing some quadrilaterals - can you complete them?

Isometric Areas explored areas of parallelograms in triangular units. Here we explore areas of triangles...

Explore the area of families of parallelograms and triangles. Can you find rules to work out the areas?

What's special about the area of quadrilaterals drawn in a square?