Coordinate Planes

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Coordinate Planes

• A Snapshot for GED Success!
• Kathy Kovach
• Crawford County READ Program
• April10, 2007

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Coordinate PlaneGED Answer Sheet

• Words to Know
• x axis
• y axis
• origin
• Coordinates (x, y)
• positive
• negative

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Coordinate Plane

• Words to Know
• Quadrants
• Points
• Plot

http//math.about.com/od/geometry/ss/cartesian.htm

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Coordinates

• (x, y)

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What are the coordinates?

• Red Dot
• (4, 2)
• Green Dot
• (-5, 5)
• Blue Dot
• (-3, -3)
• Purple Dot
• (2, -6)

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Points to Remember for the GED test

• To record an answer on the coordinate plane grid,
  you must have an x value and a y value.
• No answer for a coordinate plane grid will have a
  value that is a fraction or a decimal.
• Mark only the one circle that represents your
  answer.

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Find (1, 4)
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Find (-1, -4)
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Find (4, -3)
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Find (-3, 4).
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A rectangle is drawn on a coordinate plane so
that three vertices are located at these
coordinates     (-5, 2),(5, 2), and (-5, -3).

• What are the coordinates of the fourth vertex of
  the rectangle?
• Answer (5, -3)

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The center point of a circle is at the origin of
a coordinate plane. The circle passes through the
point (6, 0).

• At what other point does the circle cross the
  x-axis?
• (-6, 0)

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Mark the point (-3, 4) on the coordinate plane
grid on the answer sheet.
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A rectangle is drawn on a coordinate grid. Its
vertices, or corners, are located at (-2, -4),
(-2, 1), and (4, -4).

• At which point is the fourth vertex? Mark your
  answer on the coordinate grid on your answer
  sheet.
• (4, 1)

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If you graph the three given points on a
coordinate plane, then connect the points in the
order given, which set of points forms a triangle
that is upside down?

• (3, 7), (3, 3), (8, 3)
• (-4, -1), (-4, -5), (-6, -5)
• (1, -3), (-2, -3), (-2, 2)
• (-5, 5), (0, 0), (2, 2)
• (4, -1), (4, -6), (8, -1)
• Answer 5

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Segment JK is shown in the diagram below. If
segment JK is rotated 90 clockwise around J with
K now at the coordinates of (-1, 2), what is the
new midpoint of segment JK?
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The End

• See you next time for another
• Snapshot for GED Success!