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In Fig. below, triangle ABC is right-angled at B. Given that AB = 9 cm, AC = 15 cm and D, E are the mid-points of the sides AB and AC respectively

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In Fig. below, triangle ABC is right-angled at B. Given that AB = 9 cm, AC = 15 cm and D, E are the mid-points of the sides AB and AC respectively, calculate (i) The length of BC (ii) The area of ∆ADE.

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In ∆ABC 

D and E are midpoints of AB and AC

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