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| the magnitude of a number, irrespective of its sign. Written as a number inside verical lines I3I = 3 and I-3I = 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 three-dimensional 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 3-4-5 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 base-8 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 |
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