Theta

Theta (Θ θ) is the 8th letter of the Greek alphabet and has a numeric value of 9.

The lower-case letter θ is used as a symbol for:

• In mathematics and sometimes physics, the measure of an angle.

See also:

• Alpha - Beta - Gamma - Delta - Epsilon - Digamma - Zeta - Eta - Theta - Iota - Kappa - Lambda - Mu - Nu - Xi - Omicron - Pi - San - Qoppa - Rho - Sigma - Tau - Upsilon - Phi - Chi - Psi - Omega - Sampi