Geometry

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Across
  1. 4. Longest chord of the circle
  2. 5. Three points lie on the same line
  3. 7. An angle less than 90 degree
  4. 10. A triangle with all equal sides
Down
  1. 1. A pair of angle that adds up to 180
  2. 2. A three sided polygon
  3. 3. Divides the angle into two equal halves
  4. 6. it has one fixed point and extend in one direction
  5. 8. A pair of lines that never intersect
  6. 9. Quadrilateral with 4 sides equal