Vocal Crossword Puzzle

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Across
  1. 5. A triangle which has a right (90°) interior angle.
  2. 6. An angle that has measure more than 90° and less than 180°.
  3. 9. A part of a line starting at a particular point and extending infinitely in one direction.
  4. 11. A 90° angle.
  5. 13. 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.
  6. 16. A polygon with three sides.
  7. 18. The side of a right triangle opposite the right angle. Note: The hypotenuse is the longest side of a right triangle.
  8. 20. A polygon for which all sides are congruent and all angles are congruent.
  9. 21. A corner point of a geometric figure. For a polygon, vertices are where adjacent sides meet. For an angle, the vertex is where the two rays making up the angle meet. Note: If the figure is a curve or surface, the vertices are the points of maximum curvature.
  10. 23. At a 90° angle. Note: Perpendicular lines have slopes that are negative reciprocals.
  11. 24. An angle that has measure less than 90°
  12. 25. A line, segment, or ray that passes through a midpoint of another segment Angle Two rays sharing a common endpoint. Angles are typically measured in degrees or radians.
  13. 29. The point halfway between two given points
  14. 30. All points between two given points (including the given points themselves).
Down
  1. 1. A triangle with two sides that are the same length. Formally, an isosceles triangle is a triangle with at least two congruent sides.
  2. 2. A line or ray that divides an angle in half. For polygons, an angle bisector is a line that bisects an interior angle. Note: The angle bisectors of a triangle are concurrent and intersect at the incenter.
  3. 3. The geometric figure formed at the intersection of two distinct lines.
  4. 4. A triangle with two sides that are the same length. Formally, an isosceles triangle is a triangle with at least two congruent sides.
  5. 7. 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. 8. 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. Note: Congruent segments, sides, and angles are often marked.
  7. 10. For a right triangle it refers to a side other than the one opposite the right angle
  8. 12. A 180° angle.
  9. 14. 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 a regular polygon.
  10. 15. 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.
  11. 17. A triangle with three congruent sides. Note: An equilateral triangle is also equiangular. In Euclidean geometry, the angles of an equilateral triangle each measure 60°.
  12. 19. Half a circle. That is, a 180° arc.
  13. 22. The geometric figure formed by two points. A line is the straight path connecting two points and extending beyond the points in both directions.
  14. 26. Two distinct coplanar lines that do not intersect. Note: Parallel lines have the same slope.
  15. 27. 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
  16. 28. The locus of all points that are a fixed distance from a given point.