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20 Cards in this Set

  • Front
  • Back
when figures are the same size and shape
congruent figures
an angle with a 90 degree square corner
right angle
the distance across a circle through its center
diameter
an angle smaller than a right angle
acute angle
an angle larger than a right angle
obtuse angle
a figure that is formed when two lines, or rays, meet
angle
the distance from the center of a circle to any point on the circle
radius
when halves of a shape or design match or are congruent
symmetry
a motion in which a figure moves in one direction
slide (translation)
a pair of numbers or letters that names a point on a grid
ordered pair
a move that makes a figure face in the opposite directions
flip (reflection)
rotating a figure around a point
turn (rotation)
a straight path that extends in both directions
line
a part of a line and has two end points
line segment
a part of a line and has one endpoint
ray
You can form an angle by drawing two rays that meet at the same endpoint. The point is called a...
vertex
a closed figure made of line segments
polygon
a polygon with 4 sides and 4 vertices
quadrilateral
a quadrilateral made of parallel lines on opposite sides
parallelogram
has 4 sides and 4 vertices, but only one pair of sides is parallel
trapezoid