  Observations of galaxy clusters (GC's) are a powerful tool to probe the
evolution of the Universe at $z<2$. However, the determination of their real
shape and structure is not completely understood and the assumption of
asphericity is often used in several cosmological tests. In this work, we
propose methods to infer the elongation of the gas distribution of GC's based
on measurements of the cosmic expansion rate, luminosity distance to type Ia
supernovae, X-Ray and Sunyaev-Zeldovich properties of GC's and on the validity
of the so-called distance duality relation. For the sample considered, we find
that the clusters look elongated preferentially aligned along the line of sight
with the results of the different methods showing a good agreement with each
other and with those predicted by the current cosmic concordance model.
