Math Semester Project

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Across
  1. 3. angles: Two angles that are formed by a transversal and each of the two lines that the transversal intersects, if the angles are in the same position relative to those lines. Usually we only talk about corresponding angles if the two lines are parallel, and in that case corresponding angles will have equal measures. Conversely, if any transversal creates two corresponding angles that are equal in measure, then the two lines are parallel.
  2. 5. A point on a 2-dimensional plane is described by a pair (x,y). The coordinate x is given by the labels below the grid, and the coordinate y is given by the labels to the left of the grid.
  3. 7. The angle ∠ABC consists of the two rays from B that pass through A and C respectively. The spread between the directions of these rays is measured in degrees (°), and this measure is occasionally written m∠ABC, or sometimes ∠ABC, or even ∠B. 360° is a complete revolution.
  4. 8. value: The distance a number is from 0.
  5. 9. The distance around an entire figure, such as a circle or a sphere. For a sphere, this means the distance around a circle on the sphere whose center is at the center of the sphere.
  6. 13. relative frequency: A joint frequency divided by the total of its row or column in a two-way frequency table.
  7. 16. grid: A grid used to illustrate values of algebraic expressions.
  8. 17. A number that is raised to a power.
  9. 18. fit line: When the points on a grid are not all on a straight line, but seem to have a somewhat linear pattern, you can find a line that is the “best fit” (closest) to the points.
  10. 20. to the Pythagorean Theorem: If a triangle has side lengths a, b and c, and a2+b2=c2, then the triangle is a right triangle and c is the length of the side opposite its right angle.
  11. 21. The study of mathematical symbols and the rules for manipulating those symbols.
  12. 22. A group of points in a scatter plot that are near each other.
  13. 24. like terms: Using the distributive law to add any two multiples of an expression such as x. For example, you can simplify 4x+5x into 9x.
  14. 25. The size of a region in the plane, measured in unit squares (squares with side length 1).
  15. 27. law of addition: For any three numbers a, b, and c, it is always true that (a+b)+c=a+(b+c).
  16. 29. A single fixed number (unlike a variable, whose value can vary).
  17. 30. A combination of variables and numbers using arithmetic (like 6−x).
Down
  1. 1. The vertical value in a coordinate pair. It tells how far up or down the point is. The y-coordinate is always written last in the coordinate pair.
  2. 2. A way to tell that two triangles are similar, by comparing two angles in each triangle. Two triangles ▵ABC and ▵A′B′C′ are similar when the measures of ∠A and ∠A′ are equal and the measures of ∠B and ∠B′ are equal.
  3. 4. A point where a curve meets the horizontal axis (the x-axis).
  4. 5. rule: A rule that allows you to tell that two figures are congruent by looking at some of their measurements, such as the Side-Angle-Side (SAS), Angle-Side-Angle (ASA), and Side-Side-Side (SSS) rules for triangles.
  5. 6. grid: A grid of lines on a coordinate plane that makes it easy to see (x,y) coordinates of locations in that plane.
  6. 9. law of multiplication: For two numbers a and b, a(b)=b(a).
  7. 10. In economics, how much money a company spends to produce a product.
  8. 11. plane: A 2-dimensional flat surface used for plotting points, lines, curves, and regions. It contains an x and a y axis which intersect at the origin.
  9. 12. A solid figure formed by taking a flat circular disk and extending it up to a single point.
  10. 13. law of addition: For any two numbers a and b, a+b=b+a.
  11. 14. The vertical line running through the origin on a coordinate plane.
  12. 15. angle: An angle that measures less than 90°.
  13. 16. A relationship or pattern linking the values of two variables.
  14. 19. The same shape and size. Two plane figures are congruent if one can be obtained from the other by a rigid motion (a sequence of translations, rotations, and reflections).
  15. 23. even: Have a profit of zero (that is, make exactly as much money as you spend).
  16. 26. law of multiplication: For any three numbers a, b, and c, it is always true that (a(b))(c)=a(b(c)).
  17. 28. A constant that a variable or expression is multiplied by.