CBSE Class 9 Answered
In
fig., find the value of x.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
Produce AD to meet BC at point E
In AEB
We have,
A + B + AEB = 180o
(Sum of 3 angles of a triangle is 180o)
Thus,
Now, AEB + AEC = 108o (Linear pair axiom)
100o + AEC = 180o
… (i)
Now in DEC
DEC + 50o = xo
(Exterior angle is equal to sum of the opp. Interior angles)
Hence, x = 130o (By using (i))
Answered by | 04 Jun, 2014, 03:23: PM
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