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Triangles

Question
CBSEENMA9009828

In the given figure, ∠B < ∠A and ∠C < ∠D. Show that AD < BC.

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Solution

In ΔAOB,

∠B < ∠A

⇒ AO < BO (Side opposite to smaller angle is smaller) … (1)

In ΔCOD,

∠C < ∠D

⇒ OD < OC (Side opposite to smaller angle is smaller) … (2)

On adding equations (1) and (2), we obtain

AO + OD < BO + OC

AD < BC