geometry puzzle

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Across
  1. 2. – has a vertex and a circular base.
  2. 5. arc – arc whose measure is less than a semi-circle or 180 degree.
  3. 6. angle of a circle – angle whose vertex is the center of the circle and whose rays are radii of the circle.
  4. 8. - branch of mathematics that deals with points, lines, planes and solids and examines their properties
  5. 10. – arc whose endpoints are the endpoints of a diameter.
  6. 12. arc – arc whose measure is greater than a semi-circle or 180 degrees.
  7. 14. angle – angle whose measure is 180 degrees.
  8. 17. – has two congruent circular bases in parallel planes.
  9. 18. – for an acute angle of a right triangle, the ratio of the measure of the leg
  10. 19. bisector – ray that divides an angle into two congruent adjacent angles.
Down
  1. 1. the acute angle to the measure of the leg adjacent to the acute angle.
  2. 3. angle – angle whose measure is greater than 90 degrees but less than 180 degrees.
  3. 4. – set of points in space a given distance from a given point called the center.
  4. 6. arcs – arcs with equal measure in the same circle or in congruent circles.
  5. 7. – congruent polygons lying in parallel planes.
  6. 9. – consists of two points and the continuous part of a circle between them.
  7. 11. angles – angle whose vertex is on the circle and whose sides are chords of the circle.
  8. 13. triangle – triangle with a right angle.
  9. 15. – the figure formed by three segments joining three no collinear points. Each of the three points is a vertex of the triangle and the segments are the sides.
  10. 16. triangle- triangle that has all acute angles.