What branch of mathematics has a name that begins with the same greek root as geography?

The branch of mathematics that shares the same Greek root as "geography" is geometry.

Both words derive from the Greek words "geo" (earth) and "graphein" (to write or draw).

* Geography literally means "writing about the earth", referring to the study of the Earth's physical features, human populations, and natural phenomena.

* Geometry literally means "earth measurement", referring to the study of shapes, sizes, and spatial relationships.