Question

13. Let AABC – ADEF and their areas be respectively 81 cm² and 144 cm². If EF = 24 cm, then find the length of side BC.
BC = 18 cm​

Answer 1

Answer:

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And your 2nd answer of today's question is

tan (A + B) = √3 ⇒ A + B = 60° ………….. (i)

tan (A – B) = 13√13 ⇒ A – B = 30° ………… (ii)

From Eqn. (i) + Eqn.(ii), we have

2A = 90 ⇒ = 45° From eqn. (i), A + B = 60°

45° + B = 60°

∴ B = 15