Question

In the given figure, AB || CD|| MN, reflex angle angle BOM= 310° and angle= 20°
Find
a) angle BOC
b) angle OBA

please solve this please
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Answer 1

Answer:

BOD+BOC=180

130+BOC=180

BOC=180-130

BOC=50

BOC+BOE=70

BOE =70-50

BOE=20

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AOC+BOD=180

AOC+130=180

AOC=180-130

AOC=50

Reflex of AOC

360-50

310

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Answer 2

Answer:a) angle BOC = 70

b) angle OBA =110

Step-by-step explanation:<nmo=20 = <dom=20 ( adjucent angels)

BOM= BOD+DOM

BOM-DOM=BOD

130-20=110

DOB+BOC=180(by lenear pair)

BOC=180-110

BOC=70

DOB=OBA (adjsent angles)

i.e OBA =110