- In 1900 the average life span in the US was 47.
- The compass and straight edge were powerful tools in the advancement of geometry, allowing the construction of various lengths, angles and geometric shapes..
- The number Pi (the ratio of the circumference to the diameter of a circle) can't be expressed as a fraction, making it an irrational number. It never repeats and never ends when written as a decimal..
- The average American will consume over 465 trees worth of paper over their lifetime.
- Room temperature is defined as between 20 to 25C (68 to 77F).
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