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Geometry Vocab

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  • Having the same size and shape
    Congruent
    Commutative property
    Symmetry
    Vertex
  • A 90-degree angle
    Acute angle
    Obtuse angle
    Right angle
    Straight angle
  • A straight figure that extends infinitely in both directions
    Ray
    Vertex
    Line segment
    Line
  • Two lines that intersect forming two acute angles and two obtuse angles
    Commutative property
    Intersecting lines
    Perpendicular lines
    Parallel lines
  • A dot that represents a location in space
    Point
    Vertex
    Angle
    Ray
  • A closed figure with at least 3 sides
    Vertex
    Polygon
    Trapezoid
    Commutative property
  • A figure formed by two rays with a common endpoint
    Angle
    Vertex
    Line
    Point
  • The surface space an object covers
    Place value
    Area
    Vertex
    Perimeter
  • A 180-degree angle
    Obtuse angle
    Acute angle
    Right angle
    Straight angle
  • An angle that is less than 90 degrees
    Acute angle
    Straight angle
    Obtuse angle
    Right angle
  • To change
    Demonstrate
    Strategy
    Convert
    Determine
  • An angle that is more than 90 degrees
    Straight angle
    Acute angle
    Right angle
    Obtuse angle
  • A part of a line, with one endpoint, that continues without end in one direction
    Ray
    Line
    Line segment
    Vertex
  • A tool used to measure angles
    Protractor
    Vertex
    Commutative property
    Symmetry
  • Having the same shape, size, and position on both sides of a dividing line
    Vertex
    Commutative property
    Symmetry
    Congruent
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