Math is EVIL

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Across
  1. 1. a flat or plane, two-dimensional closed shape bounded with straight sides
  2. 3. a three-dimensional geometric shape with a polygon as its base and the lateral surfaces as triangles that meet at a common vertex
  3. 5. two numbers or sometimes a letter and a number, that locate a specific point on a grid
  4. 9. a four sided-polygon with two parallel sides longer than the others
  5. 12. a triangle in which two sides are of equal length
Down
  1. 1. a three-dimensional solid object in which the two ends are identical
  2. 2. the amount of space covering the outside of a three-dimensional shape
  3. 3. two straight lines that meet or intersect at 90°
  4. 4. the amount of space occupied by a 2-D figure
  5. 6. a pattern that can be cut and folded to make a model of a solid shape
  6. 7. a triangle having three unequal sides, as a triangle that is neither equilateral nor isosceles
  7. 8. the space inside a three-dimensional object, like a box
  8. 10. measures the total length around the outside of a shape
  9. 11. the point where two lines meet to form an angle