Quizlet Geometry Vocabulary

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  1. Acute Triangle: a triangle with 3 acute sides
  2. Acute angle: an angle with a measure of less than 90°
  3. Adjacent angles: 2 angles that share a vertex and a side but no points in their interiors
  4. Alternate Interior Angles: angles between 2 lines and on opposite sides of a transversal
  5. Angle: a figure formed by 2 different rays that have the same endpoint
  6. Angle Bisector: a ray dividing a given angle into two congruent angles each half the size of the given angle.
  7. Angle of Depression: an ang;e formed by a horizontal line and a line of sight below it
  8. Angle of Elevation: An angle formed by a horizontal line and a line of sight above it.
  9. Area: The number of square units a figure encloses
  10. Central Angle: an angle whose vertex is in the center of a circle.
  11. Chord: a chord of a circle is a line segment whose endpoints are on the circle.
  12. Circle: a circle is the set of all points that are equidistant from a given point, called the center.
  13. Circumference: The distance around a circle
  14. Complementary Angles: 2 angles whose sum adds to 90°
  15. Cone: a figure with one circular base and one vertex
  16. Congruent Angles: Angles that have the same measure
  17. Congruent Figures: Congruent Figures are figures that have the same size and shape
  18. Congruent Segments: Segments that have the same length
  19. Coordinate Plane: The plane formed by 2 number liines that intersect at their zero points dividing the plane into 4 quadrants
  20. Coordinates: Ordered pairs that identify points on a coordinate plane.
  21. Corresponding angles: Pairs of nonadjacent angles that lie on the same side of a transversal of 2 lines and in correspondiing positions.
  22. Corresponding angles of polygons: Matching sides of similiar or congruent figures
  23. Cube: a rectangular prism with 6 congruent faces
  24. Cylinder: a figure whose bases are circular , congruent and parallel to each other.
  25. Decagon: a polygon with 10 sides
  26. Diagonal of a polygon: a segment (line) that connects 2 non consecutive vertices.
  27. Diameter of a circle: A chord passing through the center of a circle
  28. Edge: The intersection of 2 faces of a figure.
  29. Equilateral Triangle: A triangle with 3 congruelnt sides
  30. Hypotenuse: In a right triangle, the hypotenuse is the longest side, which is opposite the right angle.
  31. Isosceles triangle: A triangle with at least 2 congruent sides
  32. Legs of a right triangle: the 2 shorter sides of the triangle
  33. Line: a series of points that extend in 2 directions without end.
  34. Obtuse Angle: An angle with a measure greater than 90° and less than 180°
  35. Obtuse Triangle: a triangle with one obtuse angle
  36. Octogon: a polygon with 8 sides
  37. Parallel Lines: lines that lie in the same plane and do not intersect..
  38. Pentagon: a polygon with 5 sides
  39. Perimeter: The distance around a figure
  40. Perpendicular Lines: Lines that intersect ot form right angles
  41. Plane: a flat surface that has no thickness and continues without end in all directions
  42. Point: a location is space that has no size
  43. Polygon: A closed figure with at least 3 sides
  44. Pyramid: a figure with triangular fice that meet in a vertex and a base that is a polygon
  45. Radius of a Circle: a segment that has one endpoint at the center of the circle and the other endpoint on the circle.
  46. Rectangle: A parallelogram with 4 right angles
  47. Right Angle: An angle whosse measure is 90°
  48. Segment: A segemt is a part of a line with 2 endpoints
  49. Transversal: a line that intersects 2 other points
  50. Triangle: A polygon with 3 sides
  51. face: a surface of a figure
  52. trapezoid: A quadrilateral with exactly one pair of parallel sides