###
Curve

the path traced by a moving point

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Data

in statistics, numerical information

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Decagon

a polygon with ten sides

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Decimal number

a number designated by a linear arrangement of one or more of the 10 digits and that uses a decimal point to define the place value of the digits

###
Decimal system

the system of numbers that uses decimal numbers

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Deductive reasoning

the process of reasoning logically from clearly stated premises to a conclusion

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Degree

a unit of measure for angles

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Degree of a polynomial

the degree of the highest-degree term in the polynomial, which is equal to the sum of the exponents in the term

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Denominator

the number or quantity under the fraction bar in a fraction; the divisor in a fraction

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Dependent equations

simultaneous equations whose solution sets are equal and whose graphs are a single line

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