CBSE Class 10 Answered
ABCD is a trapezium with AD ∥ BC and AD = 4cm. If the diagonals AC and BD intersect each other at O such that AO/OC = DO/OB =1/2, then BC =
Asked by supriyasupriya39.10 | 20 Jan, 2023, 08:40: PM
Expert Answer
In Triangles AOD and BOC , 
AOD = BOC ( vertically opposite angles when two lines intersect )
AOD = BOC ( vertically opposite angles when two lines intersect )
hence Δ AOD is similar to Δ BOC .
Hence , we have 
BC = 2 × AD = 2 × 4 cm = 8 cm
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