Cross section (geometry) of Earth at right. Cross-sections are often used in anatomy to illustrate the inner structure of an organ, as shown at left. A cross-section of a tree trunk, as shown at left, reveals growth rings that can be used to find the age of the tree and the temporal properties of its environment. Cross section (geometry) In geometry and science, a cross section is the non-empty intersection of a solid body in three-dimensional space with a plane, or the analog in higher-dimensional spaces. Cutting an object into slices creates many parallel cross sections. The boundary of a cross section in
Papal regalia and insignia the traditional red Papal shoes, but Pope Francis has reverted to black shoes. The pope's ordinary dress (also called house dress), which is worn for daily use outside of liturgical functions, consists of a white cassock with attached pellegrina and girded with a fringed white fascia (often with the papal coat of arms embroidered on it), a pectoral cross suspended from a gold cord, red papal shoes, and a white zucchetto. On more formal occasions, the pope may wear a red cape similar to the ferraiuolo except for its gold decoration. Alternatively, he may wear a red cape with a