Circle Terminology

123456789101112
Across
  1. 2. 3.14159 to 5 decimal places.
  2. 4. Half of a diameter
  3. 6. Line through a circle that dosn't go through the centre
  4. 8. Meets at a right angle
  5. 9. Cuts in half
  6. 12. The internal space of 2D shape
Down
  1. 1. Outer edge of a circle
  2. 3. Twice as long as a radius
  3. 5. An area enclosed by two radii and an arc
  4. 7. A section of the circumference
  5. 10. An area enclosed by a chord and an arc
  6. 11. A line that touches the circle's circumference in one place