Question

triangle abc similar triangle def areas be respectively 144 cm and 81cm square if ef isequalto 15 cm find BC

Answer 1

ar ABC/ArDef= bc^2/ef^2

144/81=bc^2/225

144*225/81=bc^2

400= bc^2

20=bc

Answer 2

Answer:

By using the

Area of similar triangle theorem

Step-by-step explanation:

ar(ABC)/ar(DEF) =( BC/EF)²

144 / 81 = BC² / 15²

144 × 225 / 81 = BC²

BC = √(144 × 225/ 81)

BC = 12×15 / 9

BC = 4 × 5

BC = 25

I hope it will helpful for you.

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