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In a triangle $\text{PQR, PQ} = 12$ cm and $\text{PR} = 9$ cm and $\angle \text{Q} +\angle \text{R}=120^{\circ}$. If the angle bisector of $\angle \text{P}$ meets $\text{QR}$ at $\text{M}$, find the length of $\text{PM}$

  1. $\dfrac{28\sqrt5}{9}$ cm
  2. $\dfrac{42\sqrt5}{11}$ cm
  3. $\dfrac{36\sqrt3}{7}$ cm
  4. $4\sqrt3$
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admin asked Mar 6, 2020
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In a triangle $\text{PQR, PQ} = 12$ cm and $\text{PR} = 9$ cm and $\angle \text{Q} +\angle \text{R} = 120^{\circ}$. Find the length of $\text{QR}$$\dfrac{15}{\sqrt2}$ cm$...