Q. 1265.0( 4 Votes )

Find the value of x in Fig. 6.38.


Answer :

Formula Used/Theory:-


Exterior angle is equal to sum of interior opposite angles


In Δ ABC


When BC extended to D


Exterior angle ACD = CAB + ABC


ACD = 80° + 30° = 110°


ACD = ACE + ECD (As given in figure)


ACD = x + 90°


110° = x + 90°


x = 110° - 90°


= 20°


Result:- The value of x comes out to be 20°


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