gabrian's vocab puzzle

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Across
  1. 4. a relation in which each element of the input is paired with exactly one element of the output
  2. 7. have the same measure
  3. 9. a number associated with a point on number line
Down
  1. 1. the side opposite the right angle in a right triangle
  2. 2. in a power,the number of times the base is used as a factor
  3. 3. an angle that measures greater than 90% but less than 180%
  4. 5. the set of whole numbers and their opposites
  5. 6. the point of intersection of the x-axis and y-axis
  6. 8. a triangle having three angles