5th Kopko

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Across
  1. 2. A set of logical arguments used to deduce or prove a mathematical theorem from a set of axioms.
  2. 3. Often referred to as the right cone. A cone is a solid formed by rotating a right triangle around one of its legs.
  3. 6. A line segment that passes through the center of a circle and has its two endpoints on the circle. It also represents the length of such a line segment.
  4. 7. A polyhedron whose one face is a polygon and the other faces are triangles with one common vertex.
  5. 8. A closed solid bounded by a surface on which all points are equidistant from a central point called the center.
  6. 10. The side opposite the right angle in a right triangle.
  7. 14. The length of the boundary around a shape or a figure.
  8. 15. The path of a point moving in opposite directions infinitely. A line has neither width nor thickness but length. It is the shortest distance between two points.
  9. 18. A pair of numbers that describe the position of a point on a coordinate plane by using the horizontal and vertical distances from the two reference axes.
  10. 19. A planar surface of a solid figure.
  11. 21. Two lines that intersect at right angles.
  12. 22. The distance from the center of a circle to any point on its circumference.
  13. 23. A pair of angles that add up to 90°.
  14. 26. non-adjacent angles formed by a pair of intersecting lines
  15. 28. A geometric object that has no dimension and is used to indicate a location.
  16. 30. The boundary line of a circle or the length of such a boundary line.
  17. 34. An angle that is between 90° and 180°.
  18. 35. Two rays sharing a common endpoint. Angles are typically measured in degrees or radians
  19. 36. A space figure with two parallel polygonal bases that are the same shape and the same size.
  20. 37. Two angles that add up to 180°.
  21. 38. Points or lines that all lie in the same plane.
  22. 42. An additional geometric figure that is constructed to assist in solving a problem or producing a proof.
  23. 43. The point halfway between two given points.
  24. 44. Part of a line between two points called endpoints.
  25. 46. an assumption used as a basis for mathematical reasoning.
  26. 47. A general conclusion proposed to be proved upon the basis of certain given hypotheses or assumptions
Down
  1. 1. Lying on the same straight line.
  2. 3. A can-shaped solid figure.
  3. 4. The path of a point moving in opposite directions infinitely. A line has neither width nor thickness but length. It is the shortest distance between two points.
  4. 5. term In geometry, definitions are formed using known words or terms to describe a new word.
  5. 8. straight lines that are neither parallel, nor intersecting.
  6. 9. A unit of measure used to measure the magnitude of an angle, equal in magnitude to 1/360 of a complete revolution.
  7. 11. two rays that both start from a common point and go off in exactly opposite directions.
  8. 12. Two angles in a plane which share a common vertex and a common side but do not overlap. Angles 1 and 2 below are adjacent angles
  9. 13. A flat surface that can extend forever in length and width but has no thickness. The surface of a calm sea and a flat valley are all physical models of a plane.
  10. 16. The surface included within a closed figure, measured by the number of square units needed to cover the surface.
  11. 17. An angle that has measure less than 90°.
  12. 20. two lines intersect, four angles are formed. The angles that are directly opposite to each other are called Opposite Angles.
  13. 24. A point B that lies on the line connecting two points A and C and has one of the two points on each side of it.
  14. 25. A solid bounded by at least four polygonal faces.
  15. 27. Intuitively speaking, curved away from the eye. A concave figure is a set of points some of whose chords include points that are in the set.
  16. 29. a corner or a point where lines meet
  17. 31. Intuitively speaking, curved outward or toward the eye. A convex curve is a set of points any of whose chords do not include any point that is not in the set.
  18. 32. Also called half-line. It is a straight line that extends from a point.
  19. 33. A closed plane figure bounded by at least three line segments.
  20. 38. Planar figures or solid shapes that have the same shape and size.
  21. 39. Two or more straight coplanar lines that do not intersect.
  22. 40. angle An angle that measures 90° or /2 radians.
  23. 41. A straight line or a plane that divides a line, a plane, an angle, or a shape into two equal parts.
  24. 45. A line segment where two faces of a polyhedron meet.