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Sidana [21]
3 years ago
6

The perimeter of a right triangle is 25 meters, and the area is 20 square meters. The lengths of the sides are each multiplied b

y 3. What is the area of the new triangle? Please help me, not by just giving me the answer, but by explaining how I solve this so I can solve it on my own. Thanks :)
Mathematics
1 answer:
HACTEHA [7]3 years ago
8 0
The Heron's formula for calculating area is
S=√p(p-a)(p-b)(p-c)
where
p is perimiter divided into 2
p=(a+b+c)/2
Then length of each side is multiplyed into 3
New p is bigger than old by three times
p=3(a+b+c)/2  
S=√3p*3(p-a)*3(p-b)*3(p-c)=9√p(p-a)(p-b)(p-c)
Area of new triangle are bigger than area of old triangle by 9 times.
S=20*9=180 square meters
Area of new triangle is 180 square meters.

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<em>Name two fractions that are closer to 1 than 1/2?</em>

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and 1 can be written as 10/10.

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6/10, 7/10, 8/10, 9/10

The fractions that are close to 1( i.e. 10/10) than to 1/2( i.e. 5/10) are:

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2)

<em>Name two fractions that are closer to 1 than to 0?</em>

We know that the equivalent fraction to 1 is 5/5.

also to 0 is 0/5

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<em>Name two other fractions that are closer to 0 than to 1/2?</em>

We know that the equivalent fraction to 0 is 0/10

and to 1/2 is 5/10

The fractions that lie between 0(i.e. 0/10) and 1/2(i.e. 5/10) are:

1/10, 2/10 , 3/10 , 4/10

Hence the fraction closer to 0 than to 1/2 are:

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<em> Find two of your fractions that have a sum of about 1 1/2?</em>

We know that 1 1/2 can also be written as: 3/2

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\dfrac{1}{2}+\dfrac{2}{2}=\dfrac{3}{2}

Hence the two fractions are:

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<em />

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3 years ago
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