Geometry Puzzle

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Across
  1. 1. angles that share a common vertex, a common side, and do not overlap
  2. 3. the amount of liquid or solid that will fill a 3-D object
  3. 4. two angles whose measures equal 90 degrees
  4. 5. the distance around a circle
  5. 11. two angles whose measures equal 180 degrees
  6. 12. a triangle that has no equal sides
Down
  1. 2. a figure made up of two or more simpler figures
  2. 3. angles that are formed by intersecting lines. They are opposite and congruent.
  3. 6. a solid figure that has six faces that are all squares
  4. 7. a triangle with three congruent sides and three equal angles
  5. 8. to break into non-overlapping parts
  6. 9. a triangle with at least two equal sides
  7. 10. any face that is not a base. Meets at the common vertex in a pyramid