theta

theta — noun

1. Θ (uppercase) and θ (lowercase) are the capital and small forms of the eighth ch

1.名詞B1
釋義

Θ (uppercase) and θ (lowercase) are the capital and small forms of the eighth character in the Greek writing system. This letter is widely used as a symbol in mathematics and science — for example, to label an unknown angle in geometry or to represent temperature in physics.

例句

Mathieu learned that the Greek letter θ stands for an unknown angle in geometry.

symbol for an angle in geometry

In physics class, Naoko used theta to mark the temperature in her formula.

used for temperature in physics

文法句型

theta + verb (singular)

用法筆記

Pronounced /ˈθiːtə/ (THEE-tuh) in both American and British English. The 'th' sound at the start does not exist in Mandarin or many other Asian languages, so learners often need extra practice saying it. In mathematics, θ is routinely used to label an unknown angle in trigonometry and geometry. In physics, lowercase θ often stands for temperature or an angle, while uppercase Θ may represent a thermodynamic quantity.

常見錯誤

❌I wrote a small tita on my paper.
✅I wrote a small theta on my paper.
💡The letter is spelled theta, with 'th' and not 't'; the 'th' makes a soft sound like in 'think'.