NCERT Solutions for Class 9 Maths Chapter 7 Triangles Exercise 7.4 Solutions

CBSE X Related Questions

  • 1.
    If 14th term of an A.P. is 4 and its 15th term is zero, then its first term is

      • –48
      • –56
      • 56
      • 48

    • 2.
      In the given figure, two triangles ABC and PQR are shown such that \(\angle A = \angle P\) and \(\angle C = \angle R\). If \(AD \perp BC\) and \(PS \perp QR\), then prove that (i) \(\Delta ADB \sim \Delta PSQ\) (ii) \(AD \times QS = BD \times PS\).


        • 3.
          \(17 \times 11 \times 13 + 11\) is

            • a prime number.
            • multiple of 17.
            • a composite number.
            • an odd number.

          • 4.
            In the given figure, \(\Delta ABC\) is a right-angled triangle with \(\angle A = 90^\circ\). AD is perpendicular to BC.

            35(a)(i) Prove that \(\Delta DBA \sim \Delta DAC\)


              • 5.
                If \( 2 \sin A = 1 \), then the value of \( \tan A + \cot A \) is :

                  • \( \sqrt{3} \)
                  • \( \frac{4}{\sqrt{3}} \)
                  • \( \frac{\sqrt{3}}{2} \)
                  • \( 1 \)

                • 6.
                  In the given figure, PQ is a tangent to a circle with centre \(O(-5, 3)\). If coordinates of P and Q are \((3, 1)\) and \((0, 6)\) respectively, then using distance formula, show that \(PQ \perp OQ\).

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