1. In Fig. 6.13, lines AB and CD intersect at O. If AOC +
BOE = 70° and
BOD = 40°, find
BOE and reflex
COE.
Given that,
AB is a straight line. Lines AB and CD intersect at O. and
BOD =
Since AB is a straight-line
AOC +
COE +
EOB =
[since
]
So, reflex COE =
It is given that AB and CD intersect at O
Therefore, AOC =
BOD [vertically opposite angle]
[ GIven
BOD =
]
Also,
So, BOE =