What are the three temperature scales and three degree symbols?

The three main temperature scales are Celsius (°C), Fahrenheit (°F), and Kelvin (K). Celsius is widely used in most countries for everyday temperature measurements, while Fahrenheit is primarily used in the United States. Kelvin is the SI unit for temperature and is often used in scientific contexts. Each scale has its own degree symbol, with Celsius and Fahrenheit using the degree symbol (°) and Kelvin represented simply as "K" without a degree symbol.