Parker's Spelling Lesson 24

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Across
  1. 2. A closed plane curve every point of which is equidistant from a fixed point within the curve.
  2. 6. Being or forming an angle measuring less than 90 degrees.
  3. 7. An instrument for laying down and measuring angles.
  4. 12. Exceeding 90 degrees but less than 180 degrees.
  5. 13. A branch of mathematics.
  6. 15. Having all sides equal.
  7. 17. The dimensions or capacity of something.
  8. 18. Having three sides of unequal length.
  9. 19. A polygon having three sides.
Down
  1. 1. A closed plane figure bounded by straight lines.
  2. 3. Polygon of four sides.
  3. 4. A line that intersects a system of lines.
  4. 5. Free from curves, bends, angles, or irregularities.
  5. 8. Having the difference divisible by a given modulus.
  6. 9. Joining two vertices of a rectilinear figure that are non adjacent.
  7. 10. The length of a straight line through the center of an object.
  8. 11. A straight line segment joining and included between two poins on a circle.
  9. 14. A unit of measure for arcs of a circle equal to the amount of arc that subtends a central angle of one degree.
  10. 16. Having two equal sides.
  11. 20. A line segment extending from the center of a circle or sphere to the circumference or bounding surface.