crossword puzzle

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Across
  1. 4. a.
  2. 5. Mathematics . an expression or a proposition, often algebraic, asserting the equality of two quantities.
  3. 6. 1.
  4. 9. to have or take an inclined or oblique direction or angle considered with reference to a vertical or horizontal plane; slant.
Down
  1. 1. the kind of action or activity proper to a person, thing, or institution; the purpose for which something is designed or exists; role.
  2. 2. relative frequency with which an event occurs or is likely to occur.
  3. 3. the branch of mathematics that deals with general statements of relations, utilizing letters and other symbols to represent specific sets of numbers, values, vectors, etc., in the description of such relations.
  4. 7. particular extent of space or surfa
  5. 8. part: the dark areas in the painting; the dusty area of the room