Across
- 2. A part of a line starting at a particular point and extending infinitely in one direction.
- 7. two rays with a common endpoint that point in opposite directions and form a straight line.
- 10. polygon Intuitively speaking, curved outward or toward the eye.
- 13. The boundary line of a circle or the length of such a boundary line.
- 15. Another name for analytical geometry.
- 17. An additional geometric figure that is constructed to assist in solving a problem or producing a proof.
- 19. The pair of angles opposite each other formed by two intersecting lines.
- 20. A unit of measure used to measure the magnitude of an angle, equal in magnitude to 1/360 of a complete revolution.
- 22. Two lines that intersect at right angles.
- 24. A general conclusion proposed to be proved upon the basis of certain given hypotheses or assumptions
- 26. A can-shaped solid figure.
- 28. The point on a line segment that divides the given line segment into two congruent parts.
- 29. An angle that is between 90° and 180°.
- 32. The surface included within a closed figure, measured by the number of square units needed to cover the surface.
- 34. Part of a line between two points called endpoints.
- 35. A geometric object that has no dimension and is used to indicate a location.
- 37. The length of the boundary around a shape or a figure.
- 39. An angle that is between 90° and 180°.
- 40. A line segment where two faces of a polyhedron meet.
- 41. Lying on the same straight line.
- 42. A straight line or a plane that divides a line, a plane, an angle, or a shape into two equal parts.
- 43. 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.
- 44. Planar figures or solid shapes that have the same shape and size.
Down
- 1. 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. The point B is said to be between points A and C if, and only if, AB + BC = AC, in which AB is the distance from A to B, BC is the distance from B to C, and AC is the distance from A to C.
- 3. Two rays sharing a common endpoint.acute angle An angle with a measure between 0° and 90°.
- 4. A pair of angles that add up to 90°. As shown,
- 5. A planar surface of a solid figure.
- 6. 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.
- 8. A closed plane figure bounded by at least three line segments.
- 9. The distance from the center of a circle to any point on its circumference.
- 11. A point at which the two rays of an angle meet or the intersection point of two sides of a plane figure.
- 12. A set of logical arguments used to deduce or prove a mathematical theorem from a set of axioms.
- 14. 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.
- 15. Points or lines that all lie in the same plane.
- 16. 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.
- 18. Lines in three dimensional space that do not intersect and are not parallel.
- 21. A perfect round ball.
- 23. can not be identified
- 25. The side opposite the right angle in a right triangle.
- 27. A solid bounded by at least four polygonal faces. The pairs of faces meet along their edges. Three or more edges meet in each vertex.
- 30. A polyhedron whose one face is a polygon and the other faces are triangles with one common vertex.
- 31. The units, the radian (for measuring a plane angle) and the steradian (for measuring a solid angle), used along with base units to define derived units.
- 32. angles Two angles that share the same vertex and have one side in common between them.
- 33. An angle that measures 90°
- 35. Two or more straight coplanar lines that do not intersect.
- 36. A pair of adjacent angles formed by intersecting lines.
- 37. A statement accepted as true without proof.
- 38. A space figure with two parallel polygonal bases that are the same shape and the same size.
- 41. Often referred to as the right cone. A cone is a solid formed by rotating a right triangle around one of its legs.