4th Montez Vaughn

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Across
  1. 1. angles Two angles in a plane which share a common vertex and a common side but do not overlap. Angles 1 and 2 below are adjacent angles.
  2. 3. A closed plane figure for which all sides are line segments. The name of a polygon describes the number of sides. A polygon which has all sides mutually congruent and all angles mutually congruent is called aregular polygon.
  3. 4. Exactly equal in size and shape. Congruent sides or segments have the exact same length. Congruent angles have the exact same measure. For any set of congruent geometric figures, corresponding sides, angles, faces, etc. are congruent.
  4. 5. A polyhedron with a polygonal base and lateral faces that taper to an apex. A pyramid with a triangularbase is called a tetrahedron.
  5. 6. A line segment between the center and a point on the circle or sphere. The word radius also refers to the length of this segment.
  6. 10. A solid with parallel congruent bases which are both polygons. The bases must be oriented identically. Thelateral faces of a prism are all parallelograms or rectangles.
  7. 12. A part of a line starting at a particular point and extending infinitely in one direction.
  8. 15. At a 90° angle. Note: Perpendicular lines have slopes that are negative reciprocals.
  9. 17. rays Two rays with a common endpoint that point in opposite directions and form a straight line.
  10. 18. A three dimensional figure with a single base tapering to an apex. The base can be any simple closed curve. Often the word cone refers to a right circular cone.
  11. 19. segment All points between two given points (including the given points themselves).
  12. 20. A unit of angle measure equal to of a complete revolution. There are 360 degrees in a circle.
  13. 21. A complete circular arc. Circumference also means the distance around the the outside of a circle.
  14. 22. The point halfway between two given points.
  15. 23. One of the flat surfaces making up a polyhedron. Note: The faces of a polyhedron are all polygons.
  16. 24. An angle that has measure less than 90°.
  17. 26. A method of computing interest in which interest is computed from the uptodate balance. That is, interest is earned on the interest and not just on original balance.
  18. 27. One of the line segments making up the framework of a polyhedron. The edges are where the faces intersect each other.
  19. 29. A shape or solid which has an indentation or "cave". Formally, a geometric figure is concave if there is at least one line segment connecting interior points which passes outside of the figure.
  20. 34. Two rays sharing a common endpoint. Angles are typically measured in degrees or radians.
  21. 35. pair A pair of adjacent angles formed by intersecting lines. Angles 1 and 2 below are a linear pair. So are angles 2 and 4, angles 3 and 4, and angles 1 and 3. Linear pairs of angles are supplementary.
  22. 37. The geometric figure formed at the intersection of two distinct lines.
  23. 38. The side of a right triangle opposite the right angle. Note: The hypotenuse is the longest side of a right triangle.
  24. 41. angles In the diagram below, angles 1 and 4 are vertical. So are angles 2 and 3. Vertical angles are angles opposite one another at the intersection of two lines. Vertical angles are congruent.
  25. 42. angle A 90° angle.
  26. 43. A flat surface extending in all directions. Any three noncollinear points lie on one and only one plane. So do any two distinct intersecting lines. A plane is a two-dimensional figure.
  27. 44. The size of a surface.
Down
  1. 2. A three-dimensional geometric figure with parallel congruent bases. The bases can be shaped like any closed plane figure (not necessarily a circle) and must be oriented identically.
  2. 4. An additional geometric figure that is constructed to assist in solving a problem or producing a proof.
  3. 5. Two distinct coplanar lines that do not intersect. Note: Parallel lines have the same slope.
  4. 7. A line segment between two points on the circle or sphere which passes through the center. The word diameter is also also refers to the length of this line segment
  5. 8. Proving a conjecture by assuming that the conjecture is false. If this assumption leads to a contradiction, the original conjecture must have been true
  6. 9. A statement accepted as true without proof. A postulate should be so simple and direct that it seems to be unquestionably true.
  7. 11. Two angles that add up to 180°.
  8. 13. A line segment, line, or plane that divides a geometric figure into two congruent halves.
  9. 14. A three dimensional solid consisting of all points equidistant from a given point. This point is the center of the sphere. Note: All cross-sections of a sphere are circles.
  10. 16. term The "slope" of a vertical line. A vertical line has undefined slope because all points on the line have the same x-coordinate. As a result the formula used for slope has a denominator of 0, which makes the slope undefined..
  11. 17. angle An angle that has measure more than 90° and less than 180°.
  12. 25. Lying in the same plane. For example, any set of three points in space are coplanar.
  13. 28. Lines in three dimensional space that do not intersect and are not parallel.
  14. 29. On the coordinate plane, the pair of numbers giving the location of a point (ordered pair). In three-dimensional coordinates, the triple of numbers giving the location of a point (ordered triple). In n-dimensional space, a sequence of n numbers written in parentheses.
  15. 30. Lying on the same line.
  16. 31. A corner point of a geometric figure. For a polygon, vertices are where adjacent sides meet. For anangle, the vertex is where the two rays making up the angle meet.
  17. 32. A solid with no curved surfaces or edges. All faces are polygons and all edges are line segments.
  18. 33. Point B is between points A and C if it is on the line segment connecting A and C.
  19. 36. polygon A geometric figure with no indentations. Formally, a geometric figure is convex if every line segment connecting interior points is entirely contained within the figure's
  20. 39. The distance around the outside of a plane figure. For a polygon, the perimeter is the sum of the lengths of the sides.
  21. 40. An assertion that can be proved true using the rules of logic. A theorem is proven from axioms,postulates, or other theorems already known to be true.