Maths project

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Across
  1. 1. Polynomials of degree 1 are called as?
  2. 5. If b^2-4ac>0 then the 2 roots are real and ____?
  3. 7. Which Greek mathematician gave an important truth relating to 2 equiangular triangles
  4. 8. The_____ of a circle is perpendicular to the radius through the point of contact
  5. 10. All cicles are _____
Down
  1. 2. The distance of a point from the y-axis is called as its______?
  2. 3. A pair of linear equation in 2 variables can be represented, and solved by algebraic method and _____ method?
  3. 4. Product of the greatest power of each prime factor, involved in the numbers is called? (Short form)
  4. 6. The probability of an event that cannot happen is 0. Such an event is called_____ event
  5. 9. Can "n" ever be negative? (Yes or never)