Across
- 4. A two-dimensional figure whose beginning and ending points meet, such that the plane in which the figure lies is divided into two parts---the part inside the figure and the part outside the figure (e.g., circles, squares, rectangles).
- 6. of operations An expression containing numbers and variables (e.g., 7x), and operations that involve numbers and variables (e.g., 2x + y or 3a - 4). Algebraic expressions do not contain equality or inequality symbols.
- 9. The number (0), that is, adding 0 does not change a number's vale (e.g., 5 + 0 = 5).
- 11. A number's distance from zero (0) on a number line. The absolute value of both 4, written |4|, and negative 4, written |-4|, equals 4.
- 12. property A number and its additive inverse have a sum of zero (0) (e.g., in the equation 3 + -3 = 0, 3 and -3 are additive inverses of each other).
- 13. A network of evenly spaced, parallel horizontal and vertical lines especially designed for locating points, displaying data, or drawing maps.
- 14. The way in which three or more numbers are grouped for addition or multiplication does not change their sum or product (e.g., 2 + 3 = 3 +2 or 4 x 7 = 7 x 4).
- 15. For any real numbers a, b, and x, x(a + b) = ax + bx.
- 17. The shape made by two rays extending from a common end point, the vertex. Measures of angles are described using the degree system.
- 18. Two angles, the sum of which is exactly 90 degrees.
- 19. An angle with a measure of less than 90 degrees.
- 20. The perimeter of a circle is called its circumference.
- 21. A line segment from any point on the circle passing through the center to another point on the circle.
- 22. The amount of space that can be filled. Both capacity and volume are used to measure three-dimensional spaces; how ever, capacity usually refers to fluids, whereas volume usually refers to solids.
- 23. The horizontal and vertical number lines used in a rectangular graph or coordinate grid system.
Down
- 1. A mathematical expression that contains variables and describes a pattern or relationship.
- 2. The inside region of a two-dimensional figure measured in square units (e.g., a rectangle with sides of 4 units by 6 units contains 24 square units or has an area 24 square units).
- 3. A zigzag on the line of the x- or y-axis in a line or a bar graph indicating that the data being displayed does not include all of the values that exist on the number line being used. Also called a Squiggle.
- 5. displays Different ways of displaying data in tables, charts, or graphs, including pictographs, circle graphs, single, double, or triple bar and line graphs, histograms, stem-and-leaf plots, and scatter plots.
- 7. The order in which two numbers are added or multiplied does not change their sum or product (e.g., 2 + 3 = 3 +2 or 4 x 7 = 7 x 4).
- 8. A mathematical sequence in which two expressions are connected by an equality symbol.
- 10. The line or plane upon which a figure is thought of as a resting.
- 14. A mathematical sentence in which two expressions are connected by an equality symbol.
- 16. Obtaining the measure of an object by using measuring devices, either standard devices of the customary or metric systems, or nonstandard devices such as a paper clip or pencil.
- 20. Numbers that correspond to points on a graph in the form (x , y).