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Transcript

  • 1. Geometry in the Real World
    • Clay Hearrean
    • Block 2
    • December 11, 2009
  • 2. Point
    • Exact position or location on a plane surface.
    • The middle of the home plate is a point.
  • 3. Line (Segment)
    • A line with definite endpoints.
    • In football, receivers try to stay in bounds- the boundaries are a line segment.
  • 4. Plane
    • An imaginary flat surface that is infinitely large and with zero thickness.
    • The bowling alley is a flat surface.
  • 5. Angle
    • A shape formed by two lines or rays diverging from a common point (the vertex).
    • The field goal makes 2 90 degree angles.
  • 6. Perpendicular Lines
    • A line is perpendicular to another if it meets or crosses it at right angles (90 degrees).
    • The net makes perpendicular lines with the service boxes.
  • 7. Parallel Lines
    • Lines are parallel if they lie in the same plane and are the same distant apart over their entire length.
    • Each yard line of a football field is parallel with the previous or next yard line.
  • 8. Triangle
    • A closed figure consisting of three line segments linked end to end, 3 sided polygon.
    • A baseball diamond’s infield cut in half is a triangle.
  • 9. Right Triangle
    • A triangle where one of its interior angles is a right angle (90 degrees).
    • The 10 area of the shuffle board cut in half is 2 right triangles.
  • 10. Pentagon
    • A polygon with 5 sides.
    • Most soccer balls have pentagons on them.
  • 11. Hexagon
    • A polygon with 6 sides.
    • MMA fighters fight in hexagon rings.
  • 12. Square
    • A 4-sided regular polygon with all sides equal and all internal angles 90 degrees.
    • 1st base is a square.
  • 13. Rectangle
    • A 4-sided polygon where all interior angles are 90 degrees.
    • A football field is a rectangle.
  • 14. Trapezoid
    • A quadrilateral which has at least one pair of parallel sides.
    • In an Oklahoma drill 2 trapezoidal pads are used as boundaries.
  • 15. Parallelogram
    • A quadrilateral with both pairs of opposite sides parallel and equal in length.
    • This guitar’s frets have parallelograms on them.
  • 16. Circle
    • A line forming a closed loop, every point on which is a fixed distance from a center point.
    • In hockey arenas, center ice is a circle.
  • 17. Cylinder
    • A solid with circular ends and straight sides (like a pipe).
    • The sweet spot of a baseball bat has the shape of a cylinder.
  • 18. Sphere
    • A 3-dimensional object shaped like a ball. Every point on the surface is the same distance from the center.
    • A golf ball is a sphere.
  • 19. Octagon
    • A polygon with 8 sides.
    • UFC fighters fight in octagon cages.
  • 20. Oval
    • An oval or ovoid is any curve that looks like an egg or an ellipse. It is not a precise term and there are many curves that get called "oval".
    • A NASCAR track is an oval.
  • 21. Isosceles Triangle
    • A triangle which has 2 of its sides equal in length.
    • A dartboard has many isosceles triangles.