Across
- 1. A point on a line segment that divides the segment into two congruent segments.
- 4. When two circles have the same radius.
- 7. Two lines are parallel if they are in the same plane and never intersect.
- 9. A polygon that has all interior angles less than 180°.
- 12. Writing reasoned, logical explanations that use definitions, axioms, postulates, and previously proved theorems to arrive at a conclusion about a geometric statement
- 14. Two lines the lie in the same plane.
- 15. Term that is described but is not precisely defined, because it is impossible.
- 17. A straight set of points that extends into infinity in both directions.
- 18. Accept fact but is not proven because it is possible.
- 19. Proven fact through logic and use of definitions.
- 22. Pair of adjacent angles formed when two lines intersect.
- 24. Two angles that share the same vertex and have one side in common between them.
- 26. Special kind of drawing for which we use only a compass and a straightedge.
- 27. A three-dimensional figure with all points in space a fixed distance from a given point, called the center.
- 30. A pair of angles that add up to 90°.
- 33. Part of a line, with one endpoint, and extending to infinity in one direction.
- 34. The point on an angle where the two sides intersect.
- 38. Lying on the same straight line.
- 40. A set of angels directly opposite of each other, formed by the intersection of straight lines.
- 41. Solid formed by rotating a right triangle around one of its legs.
- 42. The side of a polygon or line segment where two faces of a solid figure meet.
- 45. The side opposite the right angle in a right triangle.
- 46. An angle whose measure is 90 degrees.
- 47. The sum of the lengths of the sides of a polygon.
- 48. The surface included within a closed figure, measured by the number of square units needed to cover the surface.
- 49. A flat surface of a three-dimensional figure.
Down
- 2. The line segment joining two points on a circle and passing through the center of the circle.
- 3. Three-dimensional geometric shape.
- 4. A set of numbers or letters. ex. (2,5)
- 5. Two points on a line, and all the points between those two points.
- 6. The complete distance around a circle or a closed curve.
- 8. polygon Polygon that has one or more interior angles greater than 180°.
- 10. A location in a plane or in space, having no dimensions.
- 11. Two rays that both start from a common point and go off in exactly opposite directions.
- 13. A three-dimensional figure that has a polygon for its base and whose faces are triangles having a common vertex.
- 16. Lines that are not in the same plane and that do not intersect.
- 20. A flat surface that stretches into infinity
- 21. A pair of opposite angles that is formed by intersecting lines.
- 23. A three-dimensional solid that is bounded by plane polygons.
- 25. A closed plane figure made up of several line segments that are joined together.
- 28. A three-dimensional shape with identical parallel bases, all other faces are rectangular.
- 29. An angle whose measure is greater than 90 degrees.
- 31. Two lines are perpendicular if the angle between them is 90 degrees.
- 32. An angle with a measure between 0° and 90°.
- 35. Two angles are supplementary if their sum is 180 degrees.
- 36. A straight line or a plane that divides a line, a plane, an angle, or a shape into two equal parts.
- 37. At some point along a scale from one amount, distance, weight etc to another
- 39. The distance from the center to a point on a circle; the line segment from the center to a point on a circle.
- 43. Figure formed by two rays sharing a common endpoint.
- 44. A unit of measure of an angle.