Question
If every side of a triangle is double , the area of the new triangle is K times he area of the old one . K is equal to :
Answer: Option D
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`A_1 = sqrt(3)/2 a^2`
and `A_2 = sqrt(3)/2 (2a)^2` = `4 xx sqrt(3)/2 a^2 = 4A_1`
`:.` K = 4.
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