Question

pls answer this question pls..​

Answer 1

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Answer 2

Answer:

21 cm²

Step-by-step explanation:

Given :

AB|| CD

AB = 2 * CD

⇒  (AB/CD) = 2

∠AOB = ∠COD (Vertically Opposite angles)

∠DCO = ∠OAB (Alternate Angles)

So ΔAOB & ΔDOC are similar by the A.A.

Since both the triangles are similar so,

(Area of ΔAOB)/(Area of ΔDOC) = AB²/CD²

⇒ 84/Area of ΔDOC = 2²

⇒ Area of ΔDOC = 84/4

⇒ Area of ΔCOD= 21 cm²

Hope it helps!