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