Practicing Success
Angle between the internal bisectors of two angles $\angle B$ and $\angle C$ of a $\triangle A B C$ is $132^{\circ}$, then the value of $\angle A$ is: |
62° 72° 84° 48° |
84° |
\(\angle\)BIC = \({132}^\circ\) \(\angle\)BIC = \({90}^\circ\) + \(\frac{1}{2}\)\(\angle\)A \(\angle\)A/2 = (\({132}^\circ\) - \({90}^\circ\)) = \(\angle\)A/2 = \({42}^\circ\) = \(\angle\)A = 42 x 2 = \(\angle\)A = \({84}^\circ\) Therefore, \(\angle\)A is \({84}^\circ\). |