Question

triangle ABC and triangle DEFare equilateral triangles area (triangle ABC) : area ( DEF )=112lf AB=4 then , what is length of DE ?
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Answer 1

Answer:

ANSWER

Consider , A(ΔABC):A(ΔDEF) = 1 :2

⇒

A(ΔDEF)

A(ΔABC)

=

2

1

⇒

DE

2

AB

2

=

2

1

⇒DE

2

=2AB

2

⇒DE

2

=2×4

2

[∴AB=4]

⇒DE=

32

⇒DE=4

2

Step-by-step explanation:

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