Sommer Crossword Puzzle

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Across
  1. 3. two angles are adjacent if they have a common side and a common vertex.
  2. 4. the amount of money borrowed or invested, on which interest is calculated.
  3. 8. subtracting a given percentage of a value from the original value.
  4. 12. When the sides are the same lengths
  5. 13. Two angles are called congruent angles if they have the exact same measure.
  6. 16. each of the pairs of opposite angles made by two intersecting lines.
  7. 17. an enlarged or reduced drawing that is proportional to the original object.
  8. 19. the difference between estimated value and the actual value in comparison to the actual value and is expressed as a percentage
  9. 20. a technique used to calculate the proportion of interest paid on a sum over a set time period at a set rate.
Down
  1. 1. two angles whose sum is 90 degrees.
  2. 2. a rule used to count the total number of possible outcomes in a situation.
  3. 5. Two angles that add to 180 degrees
  4. 6. Reduction of something on sale
  5. 7. what we expect to happen
  6. 9. the probability of an event actually happening.
  7. 10. the amount added to the cost price of goods to cover overhead and profit.
  8. 11. the ratio of corresponding sides on two similar figures.
  9. 14. the difference between the final value and the initial value, expressed in the form of a percentage
  10. 15. money paid regularly at a particular rate for the use of money lent, or for delaying the repayment of a debt.
  11. 18. the amount of space covering the outside of a three-dimensional shape.