Definition

**Great Job ** **4pts ** 1. Now select 10 definitions from the on-line mathematics dictionary at [], [|http://www.math.com/school/glossary/glossindex.html] , [] , or from any other math glossary or dictionary and copy them. Your job will be to identify:
 * Assignment **

A. The term to be defined B. The general class word and C. The characteristics Concentric circles **** : ** circles that have the same center and varying radii Denominator: ** In a rational number, the number below the fraction bar that indicates how many parts the whole is divided into. See also numerator Event **** : ** In probability, an event is an occurrence or the possibility of an occurrence that is being investigated Fraction: ** a rational number  of the form a/b where a is called the numerator and b is called the denominator Hypotenuse: ** The side of the right triangle that is opposite the right angle Multiplication **** : ** The operation by which the product of two quantities is calculated. To multiply a number b by c is to add b to itself c times Origin **** : ** In the Cartesian coordinate plane, the origin is the point at which the horizontal and vertical axes intersect, at zero (0,0) Pi **** : ** The designated name  for the ratio of the circumference of a circle to its diameter Protractor: ** an instrument used to measure and draw angles on a flat surface
 * Angle bisector: ** a ray that divides an angle into two congruent angles

**Great **

2. **__Using your own words__**, write 5 definitions about any mathematical terms.
1. Trigonometry is a branch of mathematics that explores the relationships between the sides and angles of the triangles, `measure of triangles'.

2. The division is a basic mathematic operation that consists in spread **ing ** parties or groups in equal quantity.

3. Octahedron is a polyhedron that has 8 triangle__s__ **no "S" ** faces or plane surfaces like pyramids one below another.

4. Equilateral triangle is **a triangle ** __(that__ **omit) ** whose tree sides are equals and its angles have 60 degrees.

5. Sine is a trigonometry **IC ** function that has a dominion on all real numbers ( |R) and rank between one and minus ones (1, -1)

**Great ** **Es verdad ! ! **