Across
- 3. A form of the equation of a line written as y = mx + b, where m is the slope and b is the y-intercept.
- 5. The ratio of the vertical change (rise) to the horizontal change (run) between any two points on a line.
- 7. A polygon with three sides.
- 8. A polygon with all sides congruent and all angles congruent.
- 10. The line across which a reflection occurs.
- 11. A triangle with one right angle (90°).
- 16. An angle whose vertex is at the center of a circle.
- 18. A proposition that is believed to be true but has not been proven.
- 20. The ratio of a length in the image to the corresponding length in the pre-image under a dilation.
- 25. A parallelogram with all sides congruent.
- 26. A portion of a line consisting of one point, called the endpoint, and all points on the line on one side of the endpoint.
- 28. A portion of the circumference of a circle.
- 29. A polygon with four sides.
- 30. A formula used to find the distance between two points in the coordinate plane: d = √[(x₂ - x₁)² + (y₂ - y₁)²].
- 32. A flat surface of a polyhedron.
- 34. A transformation that flips a figure across a line.
- 35. Two angles that share a common vertex and side, but have no common interior points.
- 38. A line segment with endpoints on a circle.
- 39. A three-dimensional figure whose surfaces are polygons.
- 43. The ratio of the adjacent side to the hypotenuse in a right triangle.
- 45. Lines in the same plane that never intersect.
- 47. Two angles whose measures sum to 90°.
- 49. A triangle in which all angles are acute (less than 90°).
- 50. The original figure before a transformation.
- 52. The y-coordinate of the point where a line crosses the y-axis.
- 54. A line that intersects a circle at exactly two points.
- 57. A three-dimensional figure with a circular base and a curved surface that tapers to a point (vertex).
- 58. A quadrilateral with opposite sides parallel and congruent.
- 60. A quadrilateral with exactly one pair of parallel sides.
- 61. A formula used to find the coordinates of the midpoint of a line segment: ((x₁ + x₂)/2, (y₁ + y₂)/2).
- 63. An angle that measures exactly 90°.
- 64. The amount of space occupied by a three-dimensional figure.
- 65. A closed plane figure made up of straight line segments.
- 67. An angle that measures less than 90°.
- 69. A transformation that slides a figure without rotation or reflection.
- 70. A parallelogram with four right angles.
- 71. A logical argument that establishes the truth of a statement.
- 72. A portion of a line consisting of two points, called endpoints, and all points between them.
- 73. A statement accepted as true without proof (same as axiom).
- 77. Angles that appear in the same relative position when a transversal intersects two lines.
- 78. The x-coordinate of the point where a line crosses the x-axis.
- 79. Points or lines that lie in the same plane.
- 80. A rectangle with all sides congruent.
- 81. A three-dimensional figure with two parallel, congruent circular bases and a curved surface.
- 82. An angle with its vertex on a circle and sides that contain chords of the circle.
- 83. A triangle with no sides congruent.
Down
- 1. Having the same size and shape.
- 2. An angle that measures exactly 180°.
- 4. A polygon with eight sides.
- 6. A triangle with all sides congruent.
- 9. Lines that intersect to form right angles.
- 12. The ratio of the opposite side to the adjacent side in a right triangle.
- 13. A ray that divides an angle into two congruent angles.
- 14. A region of a circle bounded by an arc and two radii.
- 15. Two angles whose measures sum to 180°.
- 17. A straight set of points that extends infinitely in opposite directions.
- 19. A polyhedron with a polygonal base and triangular faces that meet at a common vertex.
- 21. The distance around a circle.
- 22. A line segment from the center of a circle to any point on the circle.
- 23. A regular polyhedron with six congruent square faces.
- 24. A line segment connecting a vertex of a triangle to the midpoint of the opposite side.
- 27. An angle that measures greater than 90° but less than 180°.
- 31. An example that disproves a statement.
- 33. A polygon with six sides.
- 36. A figure formed by two rays sharing a common endpoint (vertex).
- 37. A line that intersects a circle at exactly one point.
- 40. The set of all points in a plane that are at a fixed distance (radius) from a fixed point (center).
- 41. A transformation that changes the size of a figure but not its shape.
- 42. A statement that has been proven to be true.
- 44. The set of all points in three-dimensional space that are at a fixed distance (radius) from a fixed point (center).
- 46. The ratio of the opposite side to the hypotenuse in a right triangle.
- 48. A line that intersects two or more lines.
- 51. A triangle with at least two sides congruent.
- 53. statement - A statement of the form "if p, then q."
- 55. The common endpoint where two or more line segments, lines, or rays meet.
- 56. Having the same shape but not necessarily the same size.
- 58. The distance around a two-dimensional shape.
- 59. A triangle with one obtuse angle (greater than 90°).
- 62. A plane with a coordinate system in which the coordinates of a point are its distances from two fixed perpendicular lines called the x-axis and y-axis.
- 66. A location in space that has no size or dimension.
- 68. A line segment where two faces of a polyhedron meet.
- 71. A polyhedron with two parallel, congruent faces (called bases) and rectangular lateral faces.
- 74. A polygon with five sides.
- 75. A transformation that turns a figure about a fixed point.
- 76. A line segment that passes through the center of a circle and has endpoints on the circle.