Question

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Answer 1

we know that the ratio of ara of similar triangle is equal to the ratio of the square of their corresponding sides .

area of triangle abc / area of triangle def= BC/EF

therefore,

9/16 = 2.1 / x

by cross multiplying ,

9x= 16×2.1

x= 33.6 / 9

x = 3.7 ( approximately).

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Answer 2

Answer:

area of triangle abc/area of triangle def =bc/ef

8/16=2 .1/x

9x=16*2.1

x=33.6/9

x=3.7

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