Across
- 3. The result of dividing one number or expression by another. Sometimes a ratio is written as a proportion, such as 3:2 (three to two). More often, though, ratios are simplified according to the standard rules for simplifying fractions or rational expressions.
- 8. All positive and negative whole numbers (including zero). That is, the set {... , –3, –2, –1, 0, 1, 2, 3, ...}. Integers are indicated by either or J.
- 9. A quantity that can change or that may take on different values. Variable also refers to a letter or symbol representing such a quantity.
- 11. Numbers Real numbers that are not rational. Irrational numbers include numbers such as , , , π, e, etc.
- 12. Number A real number less than zero. Zero itself is neither negative nor positive.
- 13. Lines Two distinct coplanar lines that do not intersect. Note: Parallel lines have the same slope.
Down
- 1. Triangle A triangle which has a right (90°) interior angle.
- 2. Angle an angle that has measure less than 90°.
- 4. Number A real number greater than zero. Zero itself is not positive.
- 5. The four sections into which the x-y plane is divided by the x- and y-axes.
- 6. To figure out or compute. For example, "evaluate " means to figure out that the expression simplifies to 17.
- 7. Straight up and down. For example, a wall is vertical.
- 10. Square Any number that is the square of a rational number. For example, 0, 1, 4, 9, 16, 25, etc. are all perfect squares. So are and .