Children News:Stacking numbers to make pyramids. Stacking numbers to make pyramids. May 30, 2025 e-Paper. ... For example, the triangle below expresses the series of relationships: 5 + 3 = 8, 8 ...

The number of edges of a pyramid is twice the number of edges of the base. A triangle-based pyramid has six edges, 3 × 2 = 6. A square-based pyramid has eight edges, 4 × 2 = 8.

The unpainted wooden model of the frustum of a triangular pyramid has three trapezoidal sides and a triangular top and base. It is dissected into three pieces. A paper label attached to one side reads ...