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Level 374

Coordinate Plane, Translations


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coordinate plane
A plan formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis.
ordered pair
A pair of numbers that can be used to locate a point on a coordinate plane.
quadrants
Four regions into which a coordinate plane is divided by the x-axis and the y-axis
x-axis
The horizontal axis on a coordinate plane.
y-axis
The vertical axis on a coordinate plane.
area
the surface; Length x Width
perimeter
The distance around a geometric figure.
plane
A flat surface.
polygon
a closed figure made by joining line segments where each line segment intersects exactly 2 others
image
the resulting figure AFTER a transformation is performed on it
Pre-image
the original figure BEFORE a transformation is performed on it
Transformation
a movement on the cartesian plane
translation
It is a transformation that moves points the distance and in the same direction.
reflection
It is a transformation that flips a figure over a line of reflection.
Clockwise
the figure moves the same direction as a clock moves
Counterclockwise
the figure moves the opposite direction as a clock
origin
The centre point of a number line (ground floor of a hotel, freezing point on a thermometer)
rotate 180 degrees
the figure turns two quadrants
rotate 270 degrees
the figure turns three quadrants
rotate 90 degrees
the figure turns one quadrant
rotation
It is a transformation that turns a figure about a fixed point.
line of reflection
The line over which a figure is reflected. The vertices of the original and new figure are the same distance from this. The line of reflection can be the x-axis, the y-axis, or any line on the coordinate plane.
Center of Rotation
point around which a figure rotates
Intersecting lines
Two or more lines that meet at a common point.
parallel lines
2 lines that never cross/intersect and stay the same distance apart
Perpendicular lines
lines in a plane that intersect to form 4 right angles