Question

Please give step by step explanation of this question ​

Answer 1

sin 45° = p/h = AB/AC

⇒ 1/√2 = AB/6

⇒ AB = 6/√2 = √(36/2) = √18 = 3√2

by pythagoras theorem ,

BC = √(AC²-AB²)

= √(36-18)

= √18 =3√2

∴ Area = (1/2)*(3√2)*(3√2) = 9 cm²

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