Question

verify Ulysse formula for a square pyramid

Answer 1

In addition to the base, the pyramid has triangular faces said to be lateral; the edges that join the base and the apex are also lateral. A quadrilateral pyramid has 5 vertices, 8 edges and 5 faces. You can check the Euler's formula for this solid: 5 - 8 + 5 = 2.

Answer 2

Ulysse Formula...
V-E+F=2
where,
V - Vertices of fig
E - Edges of fig
F - Faces of fig
For sqaure pyramid,
No. of Vertices = 5
No. of Faces = 5
No. of Edges = 8

Using Formula,
V-E+F=2
5-8+5 = 2