... postponement of the use of Step 10 of the synthesis, till Step 13. 196 on the sphere and the cylinder ii that is the sphere, (83) is equal to the solid rhombus BZK].68(84) Ofwhich,69 the cone ... introduce: the cone BA (=B), and the cone B (=C). Also, see Eutocius’ comment. 200 on the sphere and the cylinder ii let E be a common section,78(f) and let A, B be joined, (g) and let ... <as> base, [the] <surface>equal to the surface of the sphere, and, <as> height, the radius of the sphere; (46) therefore the cone is equal to the sphere [(47) for the sphere has been...