Question

ABCD is a trapezium such that l || AD and AB = 4 cm. If the diagonals A and BD intersects at O such that AO/OC=DO/OB=1/2 Find BC ​

Answer 1

Answer:

Given BC∥AD and AD=4

Let BC=m

Let ∠AOD=x⇒∠COD=x

Let ∠OAD=y⇒∠OCB=y

Let CO=2a⇒OA=a

⇒△OAD and △OCB are similar.

⇒ OD/AD =OC/CB

⇒ a/4=2a/m

⇒m=8

Hence,BC=m=8

Step-by-step explanation:

please mark the ans brainliest