Maths

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Across
  1. 7. the angle directly across from a given angle.
  2. 9. a sector of a circle with an angle of 90°.
  3. 10. an algebraic fraction is a fraction whose numerator and denominator are algebraic expressions
  4. 11. a numerical or constant quantity placed before and multiplying the variable in an algebraic expression
  5. 12. the space between to interesting lines that is usually measured in angles.
Down
  1. 1. the side opposite from the right angle.
  2. 2. the unknown angle
  3. 3. a sign or measure of something
  4. 4. a straight line joining two points on the circumference
  5. 5. a region bounded by two radii and an arc
  6. 6. a quantity that needs to be calculated or found
  7. 8. a region bounded by a chord and an arc
  8. 10. any part of the circumference