If an equilateral triangle has area A, then what is the length of each of its sides, x?
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Definitely helpful if you draw a picture first.
Which values occur exactly three times?
Project Euler: Problem 5, Smallest multiple
Getting logical indexes
Set the array elements whose value is 13 to 0
Maximum value in a matrix
Length of a short side
Area of an equilateral triangle
Area of an Isoceles Triangle
Length of the hypotenuse
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