Math crossword puzzle

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Across
  1. 2. a shape formed by three or more line segments.
  2. 3. angle an angle that measures 90 degrees.
  3. 4. a triangle with two sides the same length.
  4. 9. the amount of space occupied by or the capacity of a three-dimensional shape.
  5. 10. lines that meet at right angles.
  6. 11. a corner of a polygon.
  7. 13. the measure of the distance around a two-dimensional figure.
  8. 14. a two-dimensional pattern that can be folded into a three-dimensional.
Down
  1. 1. An ordered pair of numbers used to locate a point on the coordinate grid.
  2. 3. a polygon that has all of its sides equal and all of its angles equal.
  3. 5. the area required to cover a three-dimensional shape.
  4. 6. a triangle with no sides equal.
  5. 7. a three-dimensional shape with one polygon base and lateral faces that are all triangles that meet at a vertex opposite base.
  6. 8. a three-dimensional shape with a top and a bottom.
  7. 12. The measure of the amount of surface enclosed by the boundary of a figure.