Crossword

3. The word used to describe two or more lines in the same plane that never intersect.
4. An irrational number that represents the ratio of the circumference of a circle to its diameter.
6. A theorem describing the relationship between the sides of a right angle triangle and its hypotenuse.
9. The part of the quadratic formula that is inside the square root, or the part used to determine whether a quadratic equation has real roots.
10. A curve with two disconnected branches with an eccentricity greater than 1.
11. The name for a 13-sided polygon.
13. A state in which opposing forces are balanced and the resultant force acting on the body is 0.

1. A polyhedron composed of four triangular faces and four vertices.
2. The set of numbers that can be expressed in the form p/q where p and q are integers and q≠0.
5. The turning effect of a force.
7. The symbol used to represent a sum, also the 18th letter of the Greek alphabet.
8. The branch of mathematics that deals with the properties and applications of derivatives and integrals.
12. German mathematician who introduced the concept of the Riemann hypothesis and the Riemann integral.
14. An array of numbers used to represent linear transformations used in linear algebra (e.g. used in Markov Chain Analysis).