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In geometry, the hinge theorem (sometimes called the open mouth theorem) states that if two sides of one triangle are congruent to two sides of another triangle, and the included angle of the first is larger than the included angle of the second, then the third side of the first triangle is longer than the third side of the second triangle. [1]
Hindman's theorem (Ramsey theory) Hinge theorem ; Hironaka theorem (algebraic geometry) Hirzebruch signature theorem (topology, algebraic geometry) Hirzebruch–Riemann–Roch theorem (complex manifolds) Hjelmslev's theorem ; Hobby–Rice theorem (mathematical analysis) Hodge index theorem (algebraic surfaces)
A twist-hinge dissection is one which use a three-dimensional "hinge" which is placed on the edges of pieces rather than their vertices, allowing them to be "flipped" three-dimensionally. [ 10 ] [ 11 ] As of 2002, the question of whether any two polygons must have a common twist-hinged dissection remains unsolved.
The development of analytical geometry and rigorous integral calculus in the 17th-19th centuries subsumed the method of exhaustion so that it is no longer explicitly used to solve problems. An important alternative approach was Cavalieri's principle , also termed the method of indivisibles which eventually evolved into the infinitesimal ...
Tesla is aiming to post slight growth in 2024 deliveries over last year with generous incentives across its EVs - but a lot depends on the success of the new Cybertruck pickup, which is showing ...
Two notable examples in mathematics that have been solved and closed by researchers in the late twentieth century are Fermat's Last Theorem [1] and the four-color theorem. [2] [3] An important open mathematics problem solved in the early 21st century is the Poincaré conjecture. Open problems exist in all scientific fields. For example, one of ...
The problem with credit card debt is twofold. First, the longer you carry a balance (or multiple balances), the more interest you accrue. ... though the rate you qualify for will hinge largely on ...
A top Federal Reserve official said Monday that he is leaning toward supporting an interest rate cut when the Fed meets in two weeks but that evidence of persistent inflation before then could ...