please help

Question

please help

love10129151 · Answer

http://gyazo.com/2c63f8966aacdf847693d01eee684247 help please @mathstudent55

anonymous · Answer

what dont you get?

love10129151 · Answer

x=4

anonymous · Answer

first off how much bigger is the first polygon?

love10129151 · Answer

ok

anonymous · Answer

so take similar sides and divide them by eachother and you get what?

mathstudent55 · Answer

There are 3 pairs of corresponding sides with lengths.
x - 3 corresponds to 2.5
8 corresponds to 2
16 corresponds to 4

mathstudent55 · Answer

The sides x - 3 and 2.5 have an expression x - 3, so you can't tell how much larger the left polygons is than the right polygon.
Now look at the sides 8 and 2, or the sides 16 and 4.
How many times larger is the the left side than the right side.

love10129151 · Answer

can u help with other one

mathstudent55 · Answer

How about finishing this one first?

love10129151 · Answer

ok

love10129151 · Answer

2

mathstudent55 · Answer

How many times larger is the side of the left polygon than the corresponding side of the right polygon?
8 and 2
16 and 4

mathstudent55 · Answer

It's not 2.
2 times 4 is not 16

love10129151 · Answer

8

mathstudent55 · Answer

You still don't understand it, so let me start from the beginning.
Here are the two pentagons. 
One pair of corresponding sides is shown.
|dw:1423071000384:dw|

mathstudent55 · Answer

Since that pair of corresponding sides shows x - 3 and 2.5 as the lengths, and we don't know what x is equal to yet, we don't know how many times the second pentagon is smaller than the first one.
We need more information.

mathstudent55 · Answer

|dw:1423071171466:dw|

mathstudent55 · Answer

The figure above shows two more pairs of corresponding sides with their lengths given.
The length 16 corresponds to the length 4.
The length 8 corresponds to the length 2.

mathstudent55 · Answer

|dw:1423071259486:dw|