Math:(

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Across
  1. 6. the area of a 3D shapes sides
  2. 8. are two equal lines opposite each other
  3. 11. the outside of a shape
  4. 13. a triangle with no equal sides
  5. 14. the highest point of a shape
Down
  1. 1. a point on a graph
  2. 2. an equal angled polygon
  3. 3. The inside of a 3D shape
  4. 4. A triangle with two equal sides
  5. 5. a shape with two parallel sides
  6. 7. a 90-degree angle
  7. 9. A 3D triangle
  8. 10. The inside of a shape
  9. 11. of a shape composed of line sections
  10. 12. a 2D cutout of a: d shape