*The Fermat point of a triangle is used to present simple geometric proofs of the inequalities in the title of the paper.*

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Displaying 1021 - 1030 of 1212

*A few simple models in the fields of neuroscience and high voltage engineering are presented and discussed.*

*The tangent of the sum formula is proved by using an inscribed quadrilateral whose longest side is the diameter of the circle, and the diagonals are perpendicular to the pair of oposite sides...*

*The author gives geometrical proofs of a number of identities for the Fibonacci numbers. *

*A 1932 Erdos conjecture on packing squares into a square is shown to be equivalent to a more general conjecture.*