Trigonometry and Precalculus, College of the Desert

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  1. Line Segments
    Line Segments: is a straight line from point A to point B; denoted by AB(with a line above it).

  2. Endpoints
    Endpoints: Are the ponts in which the line hits and stops. (rather then a line that passes through the point).
  3. Half-line
    Half Line or Ray: Is where you will have one endpoint and the the line segment passes through the pther point. (Donatred with AB with ---> above the AB).
  4. Angle
    Angle: An angle is formed by two rays with a common endpoint.
  5. Vertex
    Vertex: A vertex is a common endpoint.
  6. Initial Side
    Initial Side: By keeping one ray of the angle fixed, it becomes the Initial Side.
  7. Terminal Side
    Terminal Side: is the second ray that we allow to rotate to from an angle.
  8. Degrees
    Degrees: One of the units of measure used for angles.
  9. Acute Angle
    Acute Angle: An angle measuing less than 90o.
  10. Right Angle
    Right Angle: An angle that measures exactly 90o.
  11. Obtuse Angle
    Obtuse Angle: An angle that measures between 90o and 180o (but NOT including).
  12. Straight Angle
    Straigh Angle: An angle that measures exactly 180o.
  13. Perpendicular Lines
    Perpendicular Lines: Lines that intersect at right (90o) angles.
  14. Complementary
    Complementary: are angles that when added will give a right (90o) angle.
  15. Supplementary
    Supplementary: Angles that when added will give a straight angle (180o).
  16. Vertical Angles
    Image Upload 1Verticle Angles: Occure when two lines overlap resulting in 4 angles between the two lines, (as seen in the picture) the oppisite angles will always equal one another (<1+<2 = 180o; <2+<4 = 180o, therefore <1 must =<4 and by result <2 must =<3). These angles are what we call vertical Angles (the angles oppisit from one another).
  17. Parallel Lines
    Parallel Lines: Are lines that have the same slope but different intercepts, meaning that they will never touch.
  18. Transversal
    • Transversal: A line that crosses any parralel lines is said to be trasnversal.
    • Note: These will also than give us vertical Angles for each parrallel line that it crosses.
  19. Corresponding Angles
    Image Upload 2Corresponding Angles: Are angles that are the same value because they are the same position on one line while on a seperate but parallel line. (Please see picture above).
  20. Alternate Interior Angles
    Image Upload 3Alternate Interior Angles: Are angles in the oppisite position that has to be the same value do to Vertical angles and corresponding angles. (Please see picture above).
Card Set
Trigonometry and Precalculus, College of the Desert
general formulas and definitions from: James Stewarts Trigonometry and Precalculus, custom edition for College of the Desert
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