Practicing Success
In ΔABC, BD ⊥ AC at D. E is a point on BC such that ∠BEA = x°. If ∠EAC = 46° and ∠EBD = 60°, then the Ans value of x is: |
72° 78° 68° 76° |
76° |
Given BD is perpendicular to AC at D \(\angle\)BDC = \({90}^\circ\) In \(\Delta \)BDC, \(\angle\)EBD = \({60}^\circ\) and \(\angle\)BDC = \({90}^\circ\) \(\angle\)DCB = \({180}^\circ\) - \({(60\; + \; 90)}^\circ\) \(\angle\)DCB = \({30}^\circ\) In \(\Delta \)AEC, \(\angle\)EAC = \({46}^\circ\) and \(\angle\)ACE = \({30}^\circ\) \(\angle\)AEC = \({180}^\circ\) - \({(46\; + \; 30)}^\circ\) \(\angle\)DCB = \({104}^\circ\) \(\angle\)BEA = \({180}^\circ\) - \(\angle\)AEC = \(\angle\)BEA = \({180}^\circ\) - \({104}^\circ\) = \(\angle\)BEA = \({76}^\circ\) Therefore, the value of x is \({76}^\circ\). |