Culminating project crossword

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Across
  1. 2. A special curve, shaped like an arch.
  2. 4. An original amount is reduced by a consistent rate over a period of time.
  3. 6. A law stating that the square of a side of a plane triangle is equal to the sum of the squares.
  4. 7. Next to something.
  5. 11. A line through a shape so that each side is a mirror image.
  6. 13. The performance or exercise of that experiment.
  7. 14. The time required for half the nuclei in a sample of a specific isotopic species to undergo radioactive decay.
Down
  1. 1. Longest side of a right angle triangle.
  2. 3. The average of the numbers: a calculated "central" value of a set of numbers.
  3. 4. Development at an increasingly rapid rate in proportion to the growing total number or size.
  4. 5. The point a line crosses the x line
  5. 8. An equation relating the lengths of the sides of an arbitrary triangle.
  6. 9. The number which appears most often in a set of numbers.
  7. 10. A point where two or more straight lines meet a corner.
  8. 12. The middle number (in a sorted list of numbers).