5th Van Dusen

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Across
  1. 7. A three-dimensional figure bounded by plane polygonal faces.
  2. 8. A unit of measure used to measure the magnitude of an angle
  3. 9. A set of logical arguments used to deduce or prove a mathematical theorem from a set of axioms.
  4. 10. A line segment that passes through the center of a circle and has its two endpoints on the circle
  5. 11. An angle with a measure between 0° and 90°.
  6. 12. The figure formed by two rays from the same initial point. The symbol for this is .
  7. 14. The boundary line of a circle or the length of such a boundary line.
  8. 17. An angle that measures 90°
  9. 19. A polyhedron with two parallel, congruent polygons being its bases and all the other faces being parallelograms.
  10. 22. The pair of angles opposite each other formed by two intersecting lines.
  11. 27. The surface included within a closed figure, measured by the number of square units needed to cover the surface.
  12. 28. The geometric figure formed by two points. This is the straight path connecting two points and extending beyond the points in both directions.
  13. 29. Intuitively speaking, curved outward or toward the eye. the outer surface of a sphere is this
  14. 34. Also called non-coplanar lines. They are straight lines that are neither parallel, nor intersecting. They lie in different planes.
  15. 39. Two or more straight coplanar lines that do not intersect.
  16. 40. a solid formed by rotating a right triangle around one of its legs.
  17. 41. Lying on the same straight line.
  18. 42. The geometric figure formed at the intersection of two distinct lines.
  19. 43. a term or word that doesn't require further explanation or description
  20. 46. Points or lines that all lie in the same plane.
  21. 47. All points between two given points (including the given points themselves).
  22. 48. A point at which the two rays of an angle meet or the intersection point of two sides of a plane figure.
Down
  1. 1. A flat surface extending in all directions.
  2. 2. Having one thing on either side of it
  3. 3. A straight line or a plane that divides a line, a plane, an angle, or a shape into two equal parts.
  4. 4. The longest side opposite the right angle in a right triangle.
  5. 5. The length of the boundary around a shape or a figure.
  6. 6. A method of defining the position of a point by its perpendicular distance from two or more reference lines.
  7. 11. Two angles that share the same vertex and have one side in common between them.
  8. 13. A straight line along which two faces of a solid meet. A rectangular solid has twelve of these
  9. 15. When the sum of the measures of two angles is 90°
  10. 16. An angle that is between 90° and 180°.
  11. 17. Also called half-line. It is a straight line that extends from a point.
  12. 18. A three dimensional solid consisting of all points equidistant from a given point. A ball is this
  13. 20. A plane figure bounded by three or more straight-line sides.
  14. 21. Two lines that intersect at right angles.
  15. 23. A general conclusion proposed to be proved upon the basis of certain given hypotheses or assumptions
  16. 24. Intuitively speaking, curved away from the eye.The inside surface of a bowl is this when viewed from above.
  17. 25. An additional geometric figure that is made to assist in solving a problem or producing a proof.
  18. 26. Two or more rays across from each other
  19. 30. A pair of adjacent angles formed by intersecting lines.
  20. 31. In plane geometry, when one figure fits exactly on top of the other through simple translation and/or rotation, then these two figures are this
  21. 32. Two angles that add up to 180°.
  22. 33. An initial proposition or statement that is generally accepted as true without proof (self-evident truth) and from which further statements, or theorems, can be derived by using logical deduction.
  23. 35. A planar surface of a solid figure.
  24. 36. The point on a line segment that divides the given line segment into two congruent parts.
  25. 37. One of the two pairs of equal angles formed when two straight lines intersect each other.
  26. 38. A solid figure with one face a polygon (the base) and the other faces being triangles that all share the same vertex.
  27. 44. The distance from the center of a circle to any point on its circumference.
  28. 45. A tubular solid with a circular base.