Parts of a circle

123456789
Across
  1. 3. A line that crosses a circle, passing through the centre
  2. 4. A line from the centre of the circle to a point on the circumference
  3. 6. A part of a circle formed by two radii and an arc
  4. 7. A line that touches the circumference at one point only. It meets the radius
  5. 9. A straight line that joins two points on the circumference of a circle
Down
  1. 1. The distance around the outside of the circle.
  2. 2. a right angle
  3. 5. A part of a circle formed by a chord and an arc.
  4. 8. A part of a circumference of the circle