Verified answer

Answer:

∠A is common in both the triangles i.e. △ADE and △ABC

Also,

∠ADE=∠B

Since, two angles of triangles △ADE and △ABC

are equal, therefore,

△ADE∼△ABC

Using properties of similar triangles, we have :

AD/AB = DE/BC

AD/AE+EB =DE/BC

6.8/8.6+2.4= DE/5.5

DE= 6.8/2 =3.4 cm

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