Heath ID: I.cn.1

G.1

Things which are equal to the same thing are also equal to one another.

Required for

G.5, G.17, G.19, G.20, G.21, G.23, G.24, G.25, G.26, G.27, G.28, G.8, G.30, G.31, G.32, G.33, G.34, G.35, G.36, G.38, G.39, G.42, G.9, G.43, G.44, G.45, G.46, G.47, G.48, G.49, G.50, G.51, G.52, G.53, G.54, G.55, G.56, G.57, G.58, G.59, G.60, G.61, G.12, G.14, G.15, G.16