* Degrees themselves aren't directly comparable. A degree Celsius and a degree Fahrenheit are different units of measurement, like comparing inches and centimeters.
* The scales are different. The Celsius scale has 100 degrees between the freezing and boiling points of water, while Fahrenheit has 180 degrees.
* Temperature values can be higher or lower. A temperature of 5 degrees Celsius is colder than 5 degrees Fahrenheit. But, a temperature of 100 degrees Celsius is hotter than 100 degrees Fahrenheit.
So, there's no simple answer to "Is a degree centigrade greater than Fahrenheit?" It depends on the specific temperatures you're comparing.