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Rainbow [258]
3 years ago
9

In the image shown, line n is a transversal cutting parallel lines l and m.

Mathematics
1 answer:
jasenka [17]3 years ago
6 0

Answer:

Its 88

Step-by-step explanation:

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

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Triangle ABC is 20% bigger than the original, which means its side (a₁) measures, compared to the original:

a₁ = 1.2a

Then, its area is

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

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

a₂ = 0.8a

So, area is

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Now, comparing areas:

\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

<u>The area of ΔABC is </u><u>2.25x</u><u> greater than the area of ΔDEF.</u>

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