Rho facts for kids

Quick facts for kids Greek alphabet
Αα	Alpha	Νν	Nu
Ββ	Beta	Ξξ	Xi
Γγ	Gamma	Οο	Omicron
Δδ	Delta	Ππ	Pi
Εε	Epsilon	Ρρ	Rho
Ζζ	Zeta	Σσ	Sigma
Ηη	Eta	Ττ	Tau
Θθ	Theta	Υυ	Upsilon
Ιι	Iota	Φφ	Phi
Κκ	Kappa	Χχ	Chi
Λλ	Lambda	Ψψ	Psi
Μμ	Mu	Ωω	Omega
Other letters
Ϝϝ	Digamma	Ϟϟ	Koppa
Ϛϛ	Stigma	Ϡϡ	Sampi
Ͱͱ	Heta	Ϸϸ	Sho
Ϻϻ	San

Rho (looks like Ρ for big letters and ρ for small letters) is the 17th letter in the Greek alphabet. It helps make the "r" sound in both old Greek and modern Greek.

What is Rho?

In the Greek number system, Rho has a value of 100. Some letters in other alphabets came from Rho. For example, the letter R in our alphabet (the Roman alphabet) came from Rho. Also, the Cyrillic letter Р (used in languages like Russian) came from Rho.

Where is Rho Used?

You might see the small letter Rho (ρ) in science.

• In statistics, ρ can show how two things relate in a group. This is called "population correlation."
• In physics, ρ is used to talk about density. Density tells us how much "stuff" is packed into a certain space.

Images for kids

• 

  The Greek alphabet on a black figure vessel, with an R-shaped rho.