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Lines and Angles
Question
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Let OA, OB, OC and OD be the rays in the anticlockwise direction starting from OA, such that ∠AOB = ∠COD = 100°, ∠AOD = ∠BOC = 80°. Is it true that AOC and BOD are straight lines? Justify your answer by drawing the figure.

Answer

Solution not provided.
Ans.  AOC is a straight line but not BOD

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Some More Questions From Lines and Angles Chapter

In the given figure, lines AB and CD intersect at O. If ∠AOC + ∠BOE = 70° and ∠BOD = 40°, find ∠BOE and reflex angle EOC.

In figure, lines PQ and RS intersect each other at point O. If ∠POR : ∠ROQ = 5 : 7, find all the angles. 

In figure, ray OS stands on a line POQ. Ray OR and ray OT are angle bisectors of ∠POS and ∠SOQ, respectively. If ∠POS = x, find ∠ROT.

If the complement of an angle is one-third of its supplement, find the angle. 

In figure, find the value of x.

In figure, if ∠POR and ∠QOR form a linear pair and a - b = 80° then find the value of a and b.

What value of x would make XOY a line if ∠XOZ = 7x + 20° and ∠YOZ = 3x in figure.

Two supplementary angles are in the ratio 4 : 5. Find the angles.

 In figure, lines AB and CD intersect at O. If ∠AOD : ∠DOC = 4 : 5 then find ∠COB.