CBSE 9th Class Math: Numbers, Polynomials, and Geometry
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Questions and Answers

Which of the following is not a type of angle in Euclid's Geometry?

  • Obtuse
  • Straight (correct)
  • Right
  • Acute
  • The sum of a rational number and an irrational number is always irrational.

    True

    If a and b are real numbers, what is the value of the expression (a + b)^2 - (a - b)^2?

    4ab

    The area of a triangle whose sides are a, b, and c is given by Heron's Formula as √[s(s - a)(s - b)(s - c)], where s is __________.

    <p>the semi-perimeter</p> Signup and view all the answers

    Match the following polynomials with their degrees:

    <p>x^2 + 3x + 2 = 2 x^3 - 2x^2 + x - 1 = 3 x^4 - 4x^3 + 7x^2 - 2x + 1 = 4 x + 2 = 1</p> Signup and view all the answers

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