
Fact 
Category 
Date 

16 
The base of the decimal system is ten. 
Science > Math 
08/08/08 

17 
The base of the vigesimal is 20. 
Science > Math 
08/06/08 

18 
The midpoint of a line is calculated with the equation M = (x1 + x2) /2, (y1 + y2) /2. 
Science > Math 
07/01/08 

19 
The slope of a line is calculated using m=(y2y1) / (x2x1). 
Science > Math 
06/25/08 

20 
A surface with only one side and one edge is known as a MÃ¶bius strip. 
Science > Math 
06/15/08 

21 
A/An equilateral triangle is one in which all three sides are of an equal length. 
Science > Math 
06/11/08 

22 
The one hundredth digit of pi after the decimal point is nine. 
Science > Math 
06/08/08 

23 
A/An scalene triangle has no sides that are the same length. 
Science > Math 
06/06/08 

24 
A/An isosceles triangle has exactly two sides that are equal in length. 
Science > Math 
06/05/08 

25 
A googol contains a 1 followed by 100 zeros. 
Science > Math 
05/31/08 

26 
Fermat's Last Theorem states that for any integer value of n greater than 2, there are no nonzero integer solutions for x^n + y^n = z^n. 
Science > Math 
05/29/08 

27 
The natural logarithm is defined as a logarithm to base e. 
Science > Math 
05/24/08 

28 
The hypotenuse is the longest side in a right triangle. 
Science > Math 
05/20/08 
