MATHEMATIC

5. A set of step-by-step instructions for doing something, such as carrying out a computation or solving a problem.
6. The set of all points in a plane that are equality distant from a fixed point in the plane called the center of the circle.
8. A number used to locate a point on a number line, a point's distance from an origin.
12. A letter or other symbol that represents a number.
13. The curve formed by the intersection of a right circular cone and a plane parallel to the lateral edge of the cone.
15. The set of all numbers between two numbers a and b, which may include one or both of a and b.
16. The zero point in a coordinate system.
17. A line segment joining two nonconsecutive vertices of a polygon.
18. A comparison by division of two quantities with different units.
19. The result of dividing one number by another number.

1. The middle value in a set of data when the data are listed in order from smallest to largest or vise versa.
2. An informal name for a reflection transformation.
3. A product of a counting number and all smaller counting numbers.
4. The use of letters of the alphabet to represent numbers in equations, formulas, and rules.
7. A number sentence that contains an equal sign.
9. An amount left over when one number is divided by another number.
10. Where the earth and sky appear to meet, if nothing is in the way.
11. A region bounded by and including an arc and two radii of a circle.
14. A number line showing when events took place.