Simple Algebra

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Across
  1. 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).
  2. 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.
  3. 9. The number (0), that is, adding 0 does not change a number's vale (e.g., 5 + 0 = 5).
  4. 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.
  5. 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).
  6. 13. A network of evenly spaced, parallel horizontal and vertical lines especially designed for locating points, displaying data, or drawing maps.
  7. 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).
  8. 15. For any real numbers a, b, and x, x(a + b) = ax + bx.
  9. 17. The shape made by two rays extending from a common end point, the vertex. Measures of angles are described using the degree system.
  10. 18. Two angles, the sum of which is exactly 90 degrees.
  11. 19. An angle with a measure of less than 90 degrees.
  12. 20. The perimeter of a circle is called its circumference.
  13. 21. A line segment from any point on the circle passing through the center to another point on the circle.
  14. 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.
  15. 23. The horizontal and vertical number lines used in a rectangular graph or coordinate grid system.
Down
  1. 1. A mathematical expression that contains variables and describes a pattern or relationship.
  2. 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. 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.
  4. 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.
  5. 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).
  6. 8. A mathematical sequence in which two expressions are connected by an equality symbol.
  7. 10. The line or plane upon which a figure is thought of as a resting.
  8. 14. A mathematical sentence in which two expressions are connected by an equality symbol.
  9. 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.
  10. 20. Numbers that correspond to points on a graph in the form (x , y).