mathematics

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Across
  1. 3. if x + y+ z = 0 then x³ + Y³ + z³ = ?
  2. 6. pair of angles is formed when two lines intersect (angles = 180)
  3. 7. 2√3 is a rational number . true or false ?
  4. 8. csa of a right circular cone
  5. 9. the number of sides in a heptagon
Down
  1. 1. who discovered the Pythagorean theorem ?
  2. 2. where will the point (0,3) lie on the cartesian plane ?
  3. 4. volume of a hemisphere
  4. 5. the probability of finding 'f' in coffee is 2/5 . true or false ?
  5. 7. the slant height of a cone with r =3 and h = 4