anonymous
  • anonymous
A polygon has an area of 100 square inches and one of its sides is 20 inches long. If a second similar polygon has an area of 36 square inches, what is the length of the corresponding side in the second polygon? 5 in 8 2/3 in 12 in 33 1/3 in
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@erdog82
anonymous
  • anonymous
ok so, I believe you need to st up a proportion
anonymous
  • anonymous
can u help me please

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anonymous
  • anonymous
ok I am trying to..
anonymous
  • anonymous
so you know the areas of each polygon, right?
anonymous
  • anonymous
36?
anonymous
  • anonymous
and what?
anonymous
  • anonymous
100?
anonymous
  • anonymous
yes, good :)
anonymous
  • anonymous
so what now ?
anonymous
  • anonymous
|dw:1358803903084:dw|
anonymous
  • anonymous
solve for x
anonymous
  • anonymous
do you need help? Because I am trying to help you.
Mertsj
  • Mertsj
Not one of the choices.
anonymous
  • anonymous
yes please help
anonymous
  • anonymous
did you see the drawing?
anonymous
  • anonymous
?
anonymous
  • anonymous
yes i saw it..
anonymous
  • anonymous
try solving for x
anonymous
  • anonymous
100x = 36*20?
anonymous
  • anonymous
yup.
anonymous
  • anonymous
720 = 100x
anonymous
  • anonymous
then i divided and i got 7.2 but thats not one of the option choices..
anonymous
  • anonymous
|dw:1358804299965:dw|
anonymous
  • anonymous
oh yeah, what the heck?
Mertsj
  • Mertsj
Sorry but the ratio of the sides squared would be the ratio of the areas. And so the square root of the ratio of the areas would be the ratio of the sides.
anonymous
  • anonymous
huh?
Mertsj
  • Mertsj
So if the ratio of the areas is 36/100, the ratio of the sides is 6/10
anonymous
  • anonymous
7.2 is not an option for the answer.. answer options r .. 5 in. 8 2/3 in 12 in and 33 1/3 in
anonymous
  • anonymous
@Mertsj you can help @rebecca1233 now... I guess you are better at this than I am
Mertsj
  • Mertsj
6/10=x/20 Solve that if you want the answer.
anonymous
  • anonymous
so 6x= 10*20?
anonymous
  • anonymous
help me ?
anonymous
  • anonymous
hello @Mertsj
Mertsj
  • Mertsj
\[\frac{6}{10}=\frac{x}{20}\]
Mertsj
  • Mertsj
Can you solve that proportion?
anonymous
  • anonymous
so 6 *20
anonymous
  • anonymous
hen divie by 1 which gives u 12
anonymous
  • anonymous
12 in is correct answer right?
Mertsj
  • Mertsj
yes
anonymous
  • anonymous
i need help with another problem please
Mertsj
  • Mertsj
Post it. Someone will reply.

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