If you could specify the temperature of what you need would be better, like the temperature of the earth or such. But from what I can guess is that temperature changes because of the Earth's tilt and revolution around the sun causing seasons and the moon orbiting the earth which cause the day and nights we experience.
hope this benefits at least a portion of your question
In geometry, the area enclosed by a circle of radius r is πr2. Here the Greek letter π represents a constant, approximately equal to 3.14159, which is equal to the ratio of the circumference of any circle to its diameter.
