8th Period Hadley

Across

2. Points or lines that all lie in the same plane.
5. A set of numerical values that define the position of a point.
6. The longest side opposite the right angle in a right triangle.
7. Part of a line between two points called endpoints.
11. A solid bounded by at least four polygonal faces.
12. Assist in solving a problem or producing a proof.
13. A general conclusion proposed to be proved upon the basis of certain given hypotheses or assumptions
14. 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.
16. The length of the boundary around a shape or a figure.
18. A line segment that passes through the center of a circle and has its two endpoints on the circle.
19. The pair of angles opposite each other formed by two intersecting lines.
21. If the sum of the measures of two angles is 90°.
23. A polyhedron with two parallel, congruent polygons being its bases and all the other faces being parallelograms.
24. The surface included within a closed figure, measured by the number of square units needed to cover the surface.
25. 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.
29. Lying on the same straight line.
31. Also called half-line. It is a straight line that extends from a point.
32. Two lines that intersect at right angles.
38. An angle with a measure between 0° and 90°.
39. A point at which the two rays of an angle meet or the intersection point of two sides of a plane figure.
41. Intuitively speaking, curved outward or toward the eye.
44. Having one thing on either side of it.
46. A straight line along which two faces of a solid meet.
47. A tubular solid with a circular base.

Down

1. A set of logical arguments used to deduce or prove a mathematical theorem from a set of axioms.
3. 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.
4. A primitive notion is not defined in terms of previously defined concepts, but is only motivated informally, usually by an appeal to intuition and everyday experience.
8. Two angles that add up to 180°.
9. A straight line or a plane that divides a line, a plane, an angle, or a shape into two equal parts.
10. In plane geometry, when one figure fits exactly on top of the other through simple translation and/or rotation.
15. Two angles that share the same vertex and have one side in common between them.
16. A plane figure bounded by three or more straight-line sides.
17. The point on a line segment that divides the given line segment into two congruent parts.
20. A perfect round ball.
22. The figure formed by two rays from the same initial point.
23. A flat surface that can extend forever in length and width but has no thickness.
26. A pair of angles is said to be vertical
27. The boundary line of a circle or the length of such a boundary line.
28. Two or more straight coplanar lines that do not intersect.
30. An angle that measures 90°
32. Where curves or curved surfaces touch.
33. The highest power of the variable in a polynomial.
34. Solid formed by rotating a right triangle around one of its legs.
35. pair Pair of adjacent angles that form a straight line.
36. The distance from the center of a circle to any point on its circumference.
37. A planar surface of a solid figure.
40. A solid figure with one face a polygon (the base) and the other faces being triangles that all share the same vertex.
42. Two rays with a common endpoint that form a line
43. An angle that is between 90° and 180°.
45. They are straight lines that are neither parallel, nor intersecting.