Q. 84.4( 8 Votes )

# In Fig. 16.137, <

Answer :

By degree measure theorem,

AOB = 2 ACB

130o = 2 ACB

ACB = 65o

Therefore,

ACB + BCD = 180o (Linear pair)

65o + BCD = 180o

BCD = 115o

By degree measure theorem,

Reflex BOD = 2 BCD

Reflex BOD = 2 * 115o

= 230o

BOD + Reflex BOD = 360o (Complete angle)

230o + x = 360o

x = 130o

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