Practicing Success
Sides $A B$ and $A C$ of $\triangle A B C$ are produced to points $D$ and $E$, respectively. The bisectors of $\angle C B D$ and $\angle B C E$ meet at $P$. If $\angle A=78^{\circ}$, then the measure of $\angle P$ is: |
51° 61° 55° 56° |
51° |
Given \(\angle\)A = \({78}^\circ\) If the bisectors of \(\angle\)CBD and \(\angle\)BCE meet at P \(\angle\)P = \({90}^\circ\) - \(\angle\)A/2 ⇒ \(\angle\)P = \({90}^\circ\) - \(\angle\)78/2 ⇒ \(\angle\)P = \({90}^\circ\) - \({39}^\circ\) = \({51}^\circ\) Therefore, \(\angle\)P is \({51}^\circ\) |