geometry

1234567891011121314
Across
  1. 3. in or near an inner area
  2. 4. a triangle with two equal sides
  3. 6. a straight line from the center to the perimeter of a circle
  4. 7. two angles whose sum is a right angle
  5. 10. a quantity obtained by the addition of a group of numbers
  6. 12. combination of three or more notes that blend harmoniously
  7. 13. a four-sided polygon
  8. 14. a continuous portion of a circle
Down
  1. 1. a surface generated by rotating a line around a fixed line
  2. 2. elevation above sea level or above the earth's surface
  3. 5. a three-sided regular polygon
  4. 8. a triangle whose interior angles are all acute
  5. 9. a round three-dimensional closed surface
  6. 11. an angle less than 90 degrees but more than 0 degrees
  7. 12. the length of the closed curve of a circle