Circle and types of triangles

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Across
  1. 2. A line segment from the center of a circle to any point on the circle.
  2. 3. A triangle with two sides equal in length.
  3. 5. The fixed point from which all points of a circle are equally distant.
  4. 6. A plane figure made up of all points at the same distance from a fixed point.
  5. 9. A line segment that passes through the center of a circle and connects two points on the circle.
  6. 11. The distance around a circle.
Down
  1. 1. A triangle with all sides of different lengths.
  2. 4. A part of the circumference of a circle.
  3. 7. A triangle with all sides equal in length.
  4. 8. A line segment connecting two points on a circle.
  5. 10. A part of a circle bounded by two radii and an arc.
  6. 12. A triangle with one right angle.