Mah Puzzle 4 Math :))

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Across
  1. 2. A shape made up of three or more sides and each side meets at their endpoint
  2. 9. Two lines that will never intersect
  3. 11. A triangle with two equal sides
  4. 13. The outline/outside of a shape
  5. 14. A 2D shape that can be folded into a 3D shape
Down
  1. 1. Location of a point on a grid
  2. 3. The needed area to cover a 3D shape
  3. 4. A triangle with no equal sides
  4. 5. An angle that when measured is exactly 90 degrees
  5. 6. A corner of a polygon
  6. 7. A polygon with all equal sides/angles
  7. 8. A 3D shape with a top/bottom that are congruent polygons
  8. 10. A 3D shape with one polygonal base and lateral sides that are triangles and meet at a vertex
  9. 12. The inside of any shape