Safa's Geometry crossword challenge

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Across
  1. 1. A box-shaped solid object that has six identical square faces.
  2. 3. 2D shape with 3 sides.
  3. 5. a 3-dimensional object shaped like a ball.
  4. 6. curved outwards.
  5. 8. curved inwards.
Down
  1. 1. two identical flat ends that are circular and one curved side.
  2. 2. It has 8 sides.
  3. 4. 2D shaped object
  4. 5. a 2D shapre with 4 sides.
  5. 7. 3D object that is made of triangle.