Geometry Unit Vocabulary/Word Wall
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Geometry Unit Vocabulary/Word Wall

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Geometry Unit Vocabulary/Word Wall Geometry Unit Vocabulary/Word Wall Presentation Transcript

  • Point a location in space . .A B .C
  • Line segment a straight path joining two points A Bendpoint endpoint
  • Ray a straight path with a starting point that keeps going in one direction A B endpoint
  • Line a straight path that keeps going in both directions A B
  • Parallel Lines, rays, segments that never meet
  • Intersecting point of intersection Lines, rays, segments that meet
  • Perpendicular right angle Lines, rays, segments that meet at right angles
  • Angle formed by 2 rays or segments that have the same endpoint vertex
  • Right angle an angle that is 90º
  • Acute angle an angle that is less than 90º
  • Obtuse angle an angle that is between 90º and 180º
  • Straight angle an angle that is 180º
  • Reflex angle an angle that is between 180º and 360º
  • Triangle a polygon with 3 sides
  • Scalene Triangle a triangle with all sides of different lengths
  • Isoceles Triangle a triangle with two sides of same length
  • Equilateral Triangle a triangle with all sides of equal length
  • Right Triangle a triangle with one right angle
  • Obtuse Triangle a triangle with one obtuse angle
  • Acute Triangle a triangle with all acute angles
  • Quadrilateral a polygon with 4 sides
  • Trapezoid a quadrilateral with 1 pair of parallel sides
  • Parallelogram a quadrilateral with 2 pairs of parallel sides
  • Rhombus a quadrilateral with all sides equal length
  • Rectangle a parallelogram with 4 right angles
  • Square a rectangle with all sides equal
  • Kite a quadrilateral with 2 pairs of adjacent equal sides
  • Pentagon a polygon with 5 sides Regular pentagon Irregular pentagon
  • Hexagon Regular hexagon Irregular hexagon a polygon with 6 sides
  • Heptagon a polygon with 7 sides Regular heptagon Irregular heptagon
  • Octagon a polygon with 8 sides Regular octagon Irregular octagon
  • Nonagon a polygon with 9 sides Regular nonagon Irregular nonagon
  • Decagon a polygon with 10 sides Regular decagon Irregular decagon
  • Undecagon a polygon with 11 sides Regular hendecagon Irregular hendecagon
  • Dodecagon a polygon with 12 sides Regular dodecagon Irregular dodecagon
  • Circle a curved line that forms a closed path on a flat surface
  • Polygon a closed, 2-dimensional figure made up of line segments joined end to end
  • Congruent exactly the same shape and size A B C D
  • Symmetrical having the same size and shape on either side of a line
  • Regular Polygon a polygon with all sides of equal length
  • Irregular Polygon a polygon with sides of different lengths
  • Convex Polygon a polygon with all vertices pushed outward
  • Concave Polygon a polygon with at least one vertex pushed in
  • Polyhedron a closed 3-dimensional figure whose surfaces are made up of polygons
  • Sphere a 3D shape with a single curved surface
  • Cone a 3D shape with a circular base, a curved surface, and one vertex
  • Cylinder a 3D shape with 2 congruent circular bases connected by a curved surface
  • Cube a polyhedron with 6 square faces
  • Pyramid a polyhedron that has a base and triangular faces meeting at a point (vertex) Triangular pyramid Square pyramid Rectangular pyramid Pentagonal pyramid Hexagonal pyramid
  • Prism Triangular prism Square prism Rectangular prism Pentagonal prism Hexagonal prism a polyhedron that has two identical bases and all flat sides