rebecca1233
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
Delete
Share
This Question is Closed
rebecca1233
Best Response
You've already chosen the best response.
0
@erdog82
erdog82
Best Response
You've already chosen the best response.
0
ok so, I believe you need to st up a proportion
rebecca1233
Best Response
You've already chosen the best response.
0
can u help me please
erdog82
Best Response
You've already chosen the best response.
0
ok I am trying to..
erdog82
Best Response
You've already chosen the best response.
0
so you know the areas of each polygon, right?
rebecca1233
Best Response
You've already chosen the best response.
0
36?
erdog82
Best Response
You've already chosen the best response.
0
and what?
rebecca1233
Best Response
You've already chosen the best response.
0
100?
erdog82
Best Response
You've already chosen the best response.
0
yes, good :)
rebecca1233
Best Response
You've already chosen the best response.
0
so what now ?
erdog82
Best Response
You've already chosen the best response.
0
|dw:1358803903084:dw|
erdog82
Best Response
You've already chosen the best response.
0
solve for x
erdog82
Best Response
You've already chosen the best response.
0
do you need help? Because I am trying to help you.
Mertsj
Best Response
You've already chosen the best response.
1
Not one of the choices.
rebecca1233
Best Response
You've already chosen the best response.
0
yes please help
erdog82
Best Response
You've already chosen the best response.
0
did you see the drawing?
erdog82
Best Response
You've already chosen the best response.
0
?
rebecca1233
Best Response
You've already chosen the best response.
0
yes i saw it..
erdog82
Best Response
You've already chosen the best response.
0
try solving for x
rebecca1233
Best Response
You've already chosen the best response.
0
100x = 36*20?
erdog82
Best Response
You've already chosen the best response.
0
yup.
rebecca1233
Best Response
You've already chosen the best response.
0
720 = 100x
rebecca1233
Best Response
You've already chosen the best response.
0
then i divided and i got 7.2 but thats not one of the option choices..
erdog82
Best Response
You've already chosen the best response.
0
|dw:1358804299965:dw|
erdog82
Best Response
You've already chosen the best response.
0
oh yeah, what the heck?
Mertsj
Best Response
You've already chosen the best response.
1
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.
erdog82
Best Response
You've already chosen the best response.
0
huh?
Mertsj
Best Response
You've already chosen the best response.
1
So if the ratio of the areas is 36/100, the ratio of the sides is 6/10
rebecca1233
Best Response
You've already chosen the best response.
0
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
erdog82
Best Response
You've already chosen the best response.
0
@Mertsj you can help @rebecca1233 now... I guess you are better at this than I am
Mertsj
Best Response
You've already chosen the best response.
1
6/10=x/20
Solve that if you want the answer.
rebecca1233
Best Response
You've already chosen the best response.
0
so 6x= 10*20?
rebecca1233
Best Response
You've already chosen the best response.
0
help me ?
rebecca1233
Best Response
You've already chosen the best response.
0
hello @Mertsj
Mertsj
Best Response
You've already chosen the best response.
1
\[\frac{6}{10}=\frac{x}{20}\]
Mertsj
Best Response
You've already chosen the best response.
1
Can you solve that proportion?
rebecca1233
Best Response
You've already chosen the best response.
0
so 6 *20
rebecca1233
Best Response
You've already chosen the best response.
0
hen divie by 1 which gives u 12
rebecca1233
Best Response
You've already chosen the best response.
0
12 in is correct answer right?
Mertsj
Best Response
You've already chosen the best response.
1
yes
rebecca1233
Best Response
You've already chosen the best response.
0
i need help with another problem please
Mertsj
Best Response
You've already chosen the best response.
1
Post it. Someone will reply.