These Stage 4 and 5 problems haven't been solved yet. Can you be the first?
Can you find a general rule for finding the areas of equilateral triangles drawn on an isometric grid?
Can you find the areas of the trapezia in this sequence?
Use graphs to gain insights into an area and perimeter problem, or use your knowledge of area and perimeter to gain insights into the graphs...
By sketching a graph of a continuous increasing function, can you prove a useful result about integrals?