Mathematics terms class-X

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Across
  1. 2. Curve on the graph
  2. 4. All circles are .....
  3. 5. X-coordinate is called as .....
  4. 7. Y-coordinate is called as .....
  5. 9. Polynomials with highest degree 1
Down
  1. 1. Polynomials that can have 2 zeroes at most
  2. 2. A pair of lines is said to be ..... when the corresponding angles are equal
  3. 3. b²-4ac
  4. 6. Roots are also called as .....
  5. 8. Roots of Q.E are said to be ....... when b²-4ac=0