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43 Cards in this Set
- Front
- Back
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Right angle
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An angle that measures exactly 90
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Acute Angle
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An angle that measures less than 90
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Obtuse angle
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An angle that measures more than 90 but less than 180
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Straight Angle
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An angle that measures exactly 180
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Angle
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Formes by 2 line segments with a common endpoint
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Vertex
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The point of an angle where the 2 sides intersect
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Protractor
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A device for measuring angles
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Triangle
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A polygon with three sides and three angles
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Quadrilateral
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A polygon with 4 sides and 4 angles
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Pentagon
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A polygon with 5 sides and 5 angles
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Hexagon
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A polygon with 6 sides and 6 angles
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Octagon
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A polygon with 8 sides and 8 angles
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Regular Polygon
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A polygon in which all the angles are congruent and all the sides are congruent
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Congruent Angles
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Angles that have the same measures
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Vertical Angles
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Pair of oppisit congruent angles formed by intersecting lines
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Adjacent Angles
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2 angles that share both a side and a vertex
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Complementary Angles
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2 angles whose sum is 90
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Supplementary Angles
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2 angles whose sum is 180
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Intersecting
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Lines that cross at one endpoint
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Parellel
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Lines in the same plane that never intersect
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Perpendicular
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Lines that intersect that form a right angle
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Skew
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Lines that are not on the same plane and do not intersect
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Right Triangle
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A triangle with a right angle
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Acute Triangle
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A triangle with all acute angles
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Obtuse Triangle
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A triangle with a obtuse angle
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Equiladeral
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A triangle with all equal sides
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Isoceloes
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A triangle with 2 unequal sides
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Scalene
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A triangle with 3 unequal sides
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Point
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An exact location
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Line
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A straight path that extends without end in opposite direction
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Plane
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A flat surface that extends without end in all directions
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Line segment
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Made of 2 endpoints and all the points between the endpoints
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Ray
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Has one endpoint that extends without end in one direction
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Symettry
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When half a figure is an exact mirror image of the other
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Line of symmetry
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The line that reflects a figure into 2 congruent portions
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Tessalations
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A repeating arrangement with no gaps or overlaping
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Congruent
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Having the same size and the same shape
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Transformation
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Moves of a figure without changing its shape or size
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Translation
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Moving of a figure along a straight line
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Rotation
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Moving of a figure around a point
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Reflaction
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flips a figure over a line creating a mirror image
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Line of reflection
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A line that a figure is flipped across to create a mirror image
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Parellelogram
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Opposite sides are parellel and congruent
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