**DICE** - Numeric or algebraic elements of information of a problem.

**DECAGON - **A polygon with 10 sides.

**DECAMETER -** 10 meters. It is represented by *Dam*.

**DECEMBER - **Ten years old.

**DECIGRAM - **Tenth part of the gram.

**DECIMETER** - Word formed by deci (tenth) and meter. The decimeter (symbol: dm) is the tenth part of the meter.

**TENTH** - Dividing a unit into 10 equal parts, each part is one tenth of that unit. One tenth can be stated like this: _{}. Or like this: 0.1.

**Denominator - **In the fraction is the number below. It is the number that indicates how many equal parts the upper number will be divided into. In fraction 2/5 the denominator is number 5.

**Derivative** - Given a function f (x), designates its derivative by _{.} This expression allows to measure the instantaneous variation of the function. Graphically it's about calculating the slope _{} from the tangent line to the curve.

**INEQUALITY - **Inequality is an expression in one way: b, a <b, a <b, a> b, a> b, where a and b are quantities or expressions. In inequalities the following symbols are used: is not equal (different), <is less than, <is less than or equal to,> is greater than and>> is greater than or equal to.

**TEN** - Group of 10 units.

**DIAGONAL -** Line segment that one vertex to another not consecutive of a polygon. The number of diagonals of a polygon is given by (n² - 3n) / 2, where n is the number of sides.

_{}

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