Category 1
Transformation
a way to manipulate the shape of a point, a line, or shape.
Reflection
A transformation in which a geometric figure is reflected across a line
Coordinate Plane
A two-dimensional surface by two intersecting and perpendicular number lines on which points are plotted and located by their x and y coordinates.
Figure
the number of unit squares that can be contained within it
Vertices
a corner or a point where lines meet.
Polygon
any 2-dimensional shape formed with straight lines.
Congruent figures
the exact same length
Area
the number of unit squares that can be contained within it.
Perimeter
the total distance around the edge of the figure.
Size
any physical measurement, such as length
Tessellation
a covering of an infinite geometric plane without gaps or overlaps by congruent plane figures of one type or a few types.
Preimage
the set of all elements of the domain that map to the members of S.
Similar figures
the ratios of their corresponding sides are all equal.
Dilation
A transformation in which a figure grows larger.
Center of dilation
a transformation that produces an image that is the same shape as the original but is a different size.
Scale factor
a number which scales, or multiplies, some quantity
Angle of rotation
the measurement of the amount of the angle, by which a figure is rotated counterclockwise about a fixed point, often the center of a circle.
Enlargement
an act or instance of enlarging
Slide
To move a shape without rotating or flipping it
Corresponding
When two lines are crossed by another line
Symmetry
one shape becomes exactly like another when you move it in some way
Tessellation
when a shape is repeated over and over again covering a plane without any gaps or overlaps.
Vertex
The common endpoint of two or more rays or line segments
Origin
the point where they intersect
Rotation
A transformation in which a plane figure turns around a fixed center point.