27 terms

# GR6 Coordinate plane, translations, reflections and rotations, Intersections of Figures in a plane

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coordinate plane
a plane 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
the x- and y- axes divide the coordinate plane into four regions; each region is called a quadrant
x-axis
the horizontal axis on a coordinate plane
y-axis
the vertical axis on a coordinate plane
area
the number of square units needed to cover a surface
perimeter
the distance around the outside of a figure
plane
a flat surface that extends forever
polygon
a closed plane figure formed by 3 or more line segments that intersect only at their endpoints
image
a figure resulting from a transformation
pre-image
a figure before a transformation occur
transformation
a change in the size or position of a figure
translation
a movement (slide) of a figure along a straight line
reflection
a transformation of a figure that flips the figure across a line
clockwise
the figure moves the same direction as a clock moves
counterclockwise
the figure moves the opposite direction as a clock
origin
the point where the x-axis and y-axis intersect on the coordinate plane
rotate 180 degrees
rotate 270 degrees
rotate 90 degrees
rotation
a transformation in which a figure is turned about a point
line of reflection
a line that a figure is flipped across to create a mirror image of the original figure
line of reflection
a line that a figure is flipped across to create a mirror image of the original figure
center of rotation
The point about which a figure is rotated
intersecting lines
lines that cross at exactly one point
parallel lines
lines in a plane that do not intersect
perpendicular lines
lines that intersect to form right angles