Linked from
The 7 pages that link to Planetary radius, each with the reason it gives.
Super-EarthRelated: Radius measurements paired with mass help constrain a super-Earth's density.
Exoplanet detectionRelated: Transit depth gives a planet’s radius relative to its star.
Earth analogRelated: Radius is one of the main measurements used to compare an exoplanet with Earth.
Kepler-186fRelated: The measured transit depth constrains Kepler-186f’s size relative to its star.