Can you make a tetrahedron whose faces all have the same perimeter?
We usually use squares to measure area, but what if we use triangles instead?
Isometric Areas explored areas of parallelograms in triangular units. Here we explore areas of triangles...
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?