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**1.**Triangle:A scalene triangle can be defined as a triangle whose all three sides have different lengths, and all three angles are of different measures.**4.**an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.**10.**in mathematics is a concept originating in geometry.**15.**quadrilateral with at least one pair of parallel sides is called a trapezoid in American and Canadian English.**18.**:n**19.**line In geometry, parallel lines are coplanar infinite straight lines that do not intersect at any point.**21.**A circle is a shape consisting of all points in a plane that are at a given distance from a given point,**22.**Euclidean geometry, a translation is a geometric transformation that moves every point of a figure, shape or space by the same distance in a given direction.**25.**mathematics, the image of a function is the set of all output values it may produce. \**27.**Infinitely long line

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**2.**In geometry a quadrilateral is a four-sided polygon, having four edges and four corners.**3.**Euclidean plane geometry, a rectangle is a quadrilateral with four right angles.**5.**preimage (plural preimages) (mathematics) For a given function, the set of all elements of the domain that are mapped into a given subset of the codomain**6.**Triangle In geometry, an isosceles triangle is a triangle that has two sides of equal length.**7.**plane Euclidean geometry, a rhombus is a quadrilateral whose four sides all have the same length.**8.**symmetrys the property a shape has when it looks the same after some rotation by a partial turn.**9.**When viewed as a vector, a ray is a vector from a point to a point**11.**In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angle**12.**A primitive notation that shows an exact point in space**13.**Euclidean geometry, a kite is a quadrilateral with reflection symmetry across a diagonal.**14.**of rotation: In mathematics, the angle of rotation is a measurement of the amount, of namely angle, that a figure is rotated about a fixed point,**16.**geometry, a vertex is a point where two or more curves, lines, or edges meet**17.**line: n elementary geometry, two geometric objects are perpendicular if they intersect at a right angle.**20.**In mathematics, a reflection is a mapping from a Euclidean space to itself that is an isometry with a hyperplane as a set of fixed points; this set is called the axis or plane of reflection.**23.**mathematics, a rigid transformation is a geometric transformation of a Euclidean space that preserves the Euclidean distance between every pair of points.**24.**triangle: A scalene triangle can be defined as a triangle whose all three sides have different lengths, and all three angles are of different measures.**26.**In geometry, two figures or objects are congruent if they have the same shape and size,