In Fahrenheit: 35 degrees below freezing
In Celsius, 3 degrees below freezing.
(In both cases, we're using "freezing" to mean
the freezing temperature of water.)
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It depends on the scale that you are using.
Sub-zero is anything that is less than zero. That means that-1 degree, -2 degrees, -3 degrees, etc. are all 'sub-zero'. To be complete, you also have to specify whether you are talking centigrade or Fahrenheit. When centigrade, it just means the same as below freezing (0 degrees centigrade). When Fahrenheit, sub zero is starting to be seriously cold since freezing is +32 degrees Fahrenheit.
The difference between -9 degrees Celsius and 3 degrees Celsius is 12 degrees. This is because the temperature scale is linear, meaning that each degree represents an equal interval. Therefore, subtracting -9 from 3 gives us 12. It's important to note that negative temperatures indicate temperatures below freezing, while positive temperatures are above freezing.
540 degrees. 1 triangle = 180 degrees.
3 because 3*90 = 270 degrees