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3 years ago

A 60 B 30 C 1 20 D 15 fastest answer gets brainiest

Mathematics

2 answers:

Anuta_ua [19.1K]3 years ago

6 0

Answer:

i think it would be A

Step-by-step explanation:

Natasha_Volkova [10]3 years ago

6 0

Answer:

B 30

Step-by-step explanation:

The answer is B :)

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3 years ago

The length of each side of an equilateral triangle is increased by 20%, resulting in triangle ABC. If the length of each side of

kompoz [17]

Answer: Area of ΔABC is 2.25x the area of ΔDEF.

Step-by-step explanation: Because equilateral triangle has 3 equal sides, area is calculated as

$A=\frac{\sqrt{3} }{4} a^{2}$

with a as side of the triangle.

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a₁ = 1.2a

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$A_{1}=\frac{\sqrt{3} }{4}(1.2a)^{2}$

$A_{1}=\frac{\sqrt{3} }{4}1.44a^{2}$

Triangle DEF is 20% smaller than the original, which means its side is:

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$A_{2}=\frac{\sqrt{3} }{4} 0.64a^{2}$

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$\frac{A_{1}}{A_{2}}= (\frac{\sqrt{3}.1.44a^{2} }{4})(\frac{4}{\sqrt{3}.0.64a^{2} } )$

$\frac{A_{1}}{A_{2}} =$ 2.25

The area of ΔABC is 2.25x greater than the area of ΔDEF.

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