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the magnitude of a number, irrespective of its sign. Written as a number inside verical lines I3I = 3 and I3I = 3 


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an angle measuring less that 90 degrees. a Triangle with three acute angles is called an acute triangle. 


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an integer that has more factors than one and itself; i.e., a nonprime integer greater than 1. 


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two angles whose measures add up to 90 degrees. 


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a line segment formed by the intersection of two faces of a threedimensional shape. 


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a number that divides into another number 


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an oval shape, literally a set of points in a plane for which the sum of the distances from two points (called foci) is constant. 


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a triangle with three equal sides and three equal angles of 60 degrees. 


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a polygon formed by the edges of a solid. 


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the side of a right triangle opposite the right angle. Always the longest side. If c is the hypotenuse and a and b are the legs of the right triangle, then c2 = a2 + b2 


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a number that cannot be represented on the number line because it contains a factor of i, 


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The two sides of a right triangle that are not the hypotenuse (i.e., are not opposide the right angle). 


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An angle that meausres more than 90 degrees and less than 180. An obtuse triangle is one that has one obtuse angle. 


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A quadrilateral with two parallel sides. 


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The sum of the lengths of the sides of a polygon. Two polygons with same area do not necessarily have the same perimeter. 


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An irrational number represented by symbol. App. 3.14. Area of a circle  pi r 2. 


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Circumference of a circle 

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An integer greater than 1 that has no factors other than 1 and itself. The first ten are 2, 3, 5, 7, 11, 13, 17, 23, 29, and 31. 


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the rule that states, "For any right triangle, the sum of the squares of the legs is equal to the square of the hypotenuse." 


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square root symbol. With a little number written in, it represents a higher root. 


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The length of a line segment connecting the center and a point on a circle. The radius is half the diameter. 


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Having a place on the number line.. 


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A pair of numbers whose product is 1. To get reciprocal of a fraction, switch the numerator and denominator. 


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A quadrilateral with four equal sides. 


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A triangle with sides of different lengths. A 345 triangle is a scalene triangle. 


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Two angles whose measures add to 180 degrees. 


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A quadrilateral with two parallel sides and two nonparallel sides. 


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A doughnut shaped surface generated by a circle rotated about an axis in its plate that does no intersect the circle. 


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Scotland logarithms & primitive calculator 


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England Gravity & Integral and differential calculus 


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France calculating machine & barometer & Pascal's triangle 


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Greece pi & the lever & the screw & areas of planes/solid figures 


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England difference engine & analytical engine, early calculator/computer 


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Greece irrational numbers & prime/composite numbers 


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Switzerland differential calculus & algebraic notation 


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France number theory & probability theory 


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Rhodes trigonometry & mapping 


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Germany calculus & symbolic logic 


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Switzerland topology & Mobius Strip/Band 


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France analytic geometry & x and y axes 


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Augusta Ada King Lovelace 

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Numeral system is the base8 number system 10 in octal is equal to 1000 in binary 


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opposite/hypotenuse
Reciprocal  cosecant/csc 


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adjacent/hypotenuse
Reciprocal  secant/sec 


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opposite/adjacent
Reciprocal  cotangent/cot 


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adjacent/opposite
Reciprocal  tangent/tan 


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hypotenuse/adjacent
Reciprocal  cosine/cos 


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hypotenuse/opposite
Reciprocal  sine/sin 

