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39 Cards in this Set

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polygon
A plane figure formed by coplanar segments such that 1. each segment intersects exactly two other segments, one at each endpoint; and 2. no two segments with a common endpoint are collinear.
sides of a polygon
has to be 3 or more
vertex
the endpoint of a side
convex
the sides don't end
non-convex, concave
a non convex
equilateral polygon
all the sides are congruent
equiangular polygon
all the interior angles are congruent
regular polygon
A polygon that is both equiangular and equilateral.
diagonal of a polygon
a segment that joins two nonconsecutive vertices
parallelogram
A quadrilateral with both pairs of opposite sides parallel.
rhombus
A quadrilateral with four congruent sides.
rectangle
A quadrilateral with four right angles.
square
A quadrilateral with four right angles and four congruent sides.
trapezoid
A quadrilateral with exactly one pair of parallel sides, called bases. The other sides are legs.
bases of a trapezoid
the parallel sides
base angles of a trapezoid
two pairs of angles whose common side is the base of a trapezoid
legs of a trapezoid
the nonparallel sides
isosceles trapezoid
A trapezoid with congruent legs.
mid-segment of a trapezoid
a segment that connects the midpoints of two sides of a triangle
kite
A quadrilateral that has two pairs of congruent sides, but opposite sides are not congruent.
image
the new figure that results from the transformation of a figure in a plane
preimage
the original figure in the transformation of figure in a plane
transformation
the operation that maps or moves a preimage onto an image
isometry
A transformation that maps every segment to a congruent segment. Also called a congruence mapping.
reflection
a type of transformation that uses a line that acts like a mirror, called the line of reflection, with an image reflected in the line
line of reflection
acts like a mirror
line of symmetry
a line that a figure in the plane has if the figure can be mapped out onto itself nu a reflection in the line
rotation
a type of transformation in which a figure is turned about a fixed point called the center of rotation
center of rotation
a fixed point
angle of rotation
the angle formed when rays are from the center of rotation to a point and its image.
rotational symmetry
a figure in the plane has rotational symmetry if the figure can be mapped onto itself by a rotation of 180 or less
translation
a type of transformation
vector
a quantity that has both direction and magnitude and is represented by an arrow drawn between two points
initial point
starting point
terminal point
ending point
component form
the form of a vector that combines the horizontal and vertical components of the vector
glide reflection
a type of reflection
composition
the result when two or more transformations are combined to produce a single transformation
frieze pattern or border pattern
a pattern that extends to the left and right in such a way that the pattern can be mapped onto itself by a horizontal translation