Math Crossword

3. The bar over a number like 0.33333....
4. 4/3*pi*r^3 is the formula of the volume of what
8. "the product, difference, quotient and sum of two rational numbers is a rational number" What is the name of this property
9. ≅ is the sign of what
10. if a + b + c = 0 then a^3 + b^3 + c^3 is equal to the ______ of a, b and c
12. The ratio of the circumference to the diameter of a circle
13. An expression having two terms
14. The process of converting an irrational fraction into rational form
16. A number which is non terminating and non repeating
17. A group of rational and irrational numbers
18. These are denoted by an I or Z

1. A series of numbers which starts from 0 and 1 and the subsequent numbers are the sum of the previous two numbers
2. What is the name of the property which states that the sum of the angles of a triangle is 180 degrees
5. The concept of magic square was introduced by
6. smallest whole number
7. the process of writing an expression in terms of its factors
11. A type of equation in which the highest power of the variable is 1
12. What is this called "a^2 + b^2 = c^2" (related to a triangle)
15. Amount - principal equal to what
16. When plotted on a graph, simultaneous linear equations which produce coincident lines have how many solutions