**edge**Any next of a polyhedron's faces.

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**elevations**Two-dimensional see of three-dimensional figures given native the top,front, or sides. Elevations usually encompass measurements and also a scale.

**empty set**A set containing no elements. Additionally know together the null set. Signs usedto represent this collection are,

**.**

**endpoint**A suggest at the end of a segment or the beginning point of a ray.

**endpointof a ray** The beginning point the a ray.

**ends ofa kite**The usual vertices the the same sides the the kite.

**EqualFractions building **Ifthe numerator and also denominator the a portion are both multiply ( or divided) through the same nonzero number, then the resulting fractions are equal.

**This instance works due to the fact that 3/3 is another name for one**, and also anynumber once multiplied by one retains its original value.

**equallylikely outcomes **Outcomesin a case where each outcome is assumed to occur as frequently as everyother outcome.

**equation**A sentence withan same sign.

**Ex:** 3x + 7 = 19

**equationof the type x + a = b**An equation in which an unknown number* x* is included to a knownnumber *a*, causing a recognized number* b*.

**Ex:** x + 8 =16

**equationof the form ax = b**An equation in i m sorry the unknown number *x* is multiply by aknown number *a*, causing a recognized number *b*.

**Ex:** 4x = 64

**equationof the form ax + b = c**An equation in i m sorry an unknown number *x* is multipliedby a recognized number *a*, then added to a well-known number *b*,resulting in a known number* c*.

**Ex:** 2x + 7 = 27

**equationof the type ax + b = cx + d**An equationin i beg your pardon the exact same unknown number *x* is multiplied by number *a*and *c* and included to known numbers *b* and also *d*, resultingin same values.

**Ex:** 5x + 8 = 3x +-10

**equiangularpolygon**A polygon with all angles of equal measure.

**equidistant**At the exact same distance.

**equilateralpolygon**A polygon with all sides of equal length.

**equilateraltriangle **Atriangle in which all the sides have the same length.

**equivalentformulas**Formulas in i beg your pardon the same numbers work.

**equivalentsentences**Sentences the have specifically the exact same solutions.

**estimate**A number i beg your pardon is nearanother number. Also called *approximation*.

**EstimationPrinciple **Iftwo numbers are almost equal, then when one is substituted for the otherin a computation will be nearly equal.

**Euclid **AGreek mathematician, who lived around 300 B.C., famed for his Elements,a repertoire of theorems and also problems that forms a logical system of geometry.Euclid additionally wrote on conic sections, optics, algebra and also numbers. The provedthat the variety of primes is infinite. He established the an initial school ofmathematics in ~ Alexandria. For an ext than 2,000 years, Euclidean geometrywas the just kind teach in schools.

**Euclideangeometry**The geometry based upon Euclid's axioms.

**evaluatingan expression **Findingthe worth of an algebraic expression through substituting a value for the variable(s)and then applying the orderof operations, PEMDAS (parentheses, exponents, multiplication anddivision native left to right, and enhancement and individually from left toright).

** evaluatinga numerical expressionWorking outthe arithmetic in a numerical expression. The bespeak of operations, PEMDAS**(parentheses, exponents, multiplication and division from left to right,and enhancement and subtraction from left come right), have to be followedwhen examining any numerical expression

**even node**A node i beg your pardon is the endpoint of an even variety of arcs in a network.

**event**A collectionof possible outcomes of an experiment.

**exercise**A inquiry whichyou know just how to answer.

** expansionA size change with size greater** than one.

**exponent**In the power *x^n, n* is the exponent.

**extendedratio**A sequence of 3 or more numbers representing the family member sizes ofthe numbers (or quantities).

**Ex:**

**This 30, 60, 90 level triangle has actually angles which monitor a 1:2:3 ratiobecause 60 is 2 times bigger than 30, and 90 is 3 times biggerthan 30.**

**exteriorangle**An angle created by 2 lines and also a transversal whose inner containsno points in between the two lines. An angle which develops a straight pair withan angle of a given polygon.

**over you see angles 1, 2, 3, 4, 5, and also 6 are all exterior angles.NOTE:**If the 2 lines that are cut by the transversal room parallel,then the

**alternate**exterior angles, 1&4, 2&3, will be congruent

**exteriorof a circle**The set of points in ~ a distance **greater **than the radius from thecenter the the circle. It's just every little thing not in or on the circle itself.

**exteriorof a figure**When a figure separates the airplane into 2 parts, one bounded and onenot, the unbounded part.

**exteriorof one angle**A nonzero angle separates the airplane into 2 sets the points. If the angleis not straight, the non-convex set is the exterior the the angle.

** extremesofa ratio **In the proportion

*a/b= c/d*, the numbers

*a*and

*d*.

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**means,**and thatthe product that the method isalways same to the product the the extremes in any proportion.

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