Quizlet Math- geometry

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  1. Acute Triangle: All angles in the triangle are less than 90 degrees.
  2. Circle: An infinite number of points connected around an equal distance from a middle point`
  3. Concave polyhedron: Is defined in a manner similar to that used in defining a concave polygon.
  4. Cone: A siple closed surface whose base is a simple closed surface and whose lateral surfaces slopes up to a vertex that is called the apex
  5. Convex Polyhedron: is defined in a manner similar to that used in defining a convex polygon
  6. Convex polyhedron: is defined in a manner similar to that used in defining a convex polygon
  7. Cylinder: A simple closed surface that is bounded by two congruent simple closed surfaces that lie in the parallel plane
  8. Equilateral Triangle: All the sides of the triangle are equal in length
  9. Isosceles Triangle: A triangle with at least 2 congruent sides
  10. Kite: Quadrilateral with 2 pairs of adjacent congruent sides, with perpendicular diagnals
  11. Obtuse Triangle: A triangle where one angle measures over 90 degrees.
  12. Parallelogram: Quadrilateral in which the opposite sides are parallel
  13. Polyhedron: (The plural is polyhedra) A three dimensional object whose surfaces are composed of polygonal regions (faces, verices, edges)
  14. Pyramid: A polyhedron whose base is a polygon ad whose faces are triangles that have a common vertex. That common vertex is called the apex of the pyramid.
  15. Rectangle: A quadrilateral in which the opposite sides are parallel, all angles are 90 degrees
  16. Regular Polyhedron: A convex polyhedron in which the faces are congruent regular polygons and in which the number of edges that meet at each vertex are the same.
  17. Rhombus: A quadrilateral, all 4 sides the same length
  18. Right Triangle: One angle in the triangle measures exactly 90 degrees.
  19. Scalene triangle: No equal sides
  20. Sphere: All points in a space that are a fixed distance away from a fixed poit
  21. Sphere: The set of all points in a three dimensional space that are the same distance from a fixed point, called the center
  22. Square: A quadrilateral with 4 sides that are equal and has all 90 degree angles
  23. Trapezoid bd: A quadrilateral with at least 1 pair of parallel sides
  24. Trapezoid hd: Quadrilateral in which exactly 1 pair of parallel sides
  25. prism: a polyhedron that has two parallel faces that are congruent. These 2 faces are called the bases of the prism. The other faces of the prism are called the lateral faces. (right prism, oblique prism)