Math

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Across
  1. 2. The perimeter of a circle
  2. 4. 3.14
  3. 6. A pair of angles formed by two intersecting lines
  4. 8. The boundary of a closed geometric figure
  5. 10. Two angles that share a common vertex and a common side, but do not overlap
Down
  1. 1. Two angles whose sum equals 180 degrees
  2. 2. Two angles whose sum equals 90 degrees
  3. 3. A straight line passing from side to side through the center of a circle
  4. 5. The amount of space occupied by a two-dimensional figure
  5. 7. A closed two-dimensional figure in which the set of all the points in the plane is equidistant from the center
  6. 9. A straight line from the center to the circumference of a circle