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A triangle is a polygon with three corners and three sides, one of the basic shapes in geometry.The corners, also called vertices, are zero-dimensional points while the sides connecting them, also called edges, are one-dimensional line segments.
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Basis of trigonometry: if two right triangles have equal acute angles, they are similar, so their corresponding side lengths are proportional.. In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) [1] are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.
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Northern Triangle of Central America: Guatemala, Honduras and El Salvador The Northern Triangle of Central America three countries, Guatemala, El Salvador, and Honduras. . These countries share a border tripoint at Trifinio Fraternidad Transboundary Biosphere Reserve, and also aspects of classical cultures, history, society, and poli
Penrose triangle. The Penrose triangle, also known as the Penrose tribar, the impossible tribar, [1] or the impossible triangle, [2] is a triangular impossible object, an optical illusion consisting of an object which can be depicted in a perspective drawing.
Each of the fourteen congruent heptagonal triangles has one green side, one blue side, and one red side.. In Euclidean geometry, a heptagonal triangle is an obtuse, scalene triangle whose vertices coincide with the first, second, and fourth vertices of a regular heptagon (from an arbitrary starting vertex).