GEOMETRY VOCABULARY

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Across
  1. 3. A triangle in which every angle is an acute angle
  2. 6. The longest chord of a circle
  3. 8. A smooth flat surface which extends endlessly in all the directions
  4. 9. A triangle whose all sides are equal
  5. 10. Circles with the same centre
  6. 11. The line which lie on the same plane and do not intersect
Down
  1. 1. The points which lie on the same straight line
  2. 2. A closed figure bounded by three line segments
  3. 4. The perimeter of a circle
  4. 5. The common end point of the angle
  5. 7. Half of a circle
  6. 10. A line segment whose end points lie on the circle