Question

WILL GIVE MEDAL AND FAN!!!!!!!!!!
How do you do scale factor???

Answer 1

to do a scale factor, divide 375 by 135, you get 25/9 (2.77777) the scale factor is 25/9, to do this with anything else, divide the 2 numbers

Answer 2

hope this helped

Answer 3

if this is still confusing, ask me

Answer 4

thx that make lots more sense but wait can i ask some more questions

Answer 5

this is something i have been having so much trouble with i have asked many people bout this and i found out that the first one is cylinder

Answer 6

@DamienGannon are you still there

Answer 7

yes, sorry

Answer 8

sorry, honestly i dont know how to answer that question

Answer 9

so do you think you can help me with this???

Answer 10

well if you can I have some other questions about scale factor

Answer 11

ok ask them

Answer 12

@skittles_for_life6422 let's back up to the first question.
Do you know what a scale factor is?

Answer 13

yeah

Answer 14

ok. what @DamienGannon did was the first step. Just dividing or multiplying only works if you're trying to find the scale factor using side lengths.

To find the scale factor with area, you have to take the square root after dividing. So the scale factor for the first one would be \[\sqrt{\frac{ 375 }{ 135 }}=\sqrt{\frac{ 25 }{ 9 }}=\frac{ 5 }{ 3 }\]

Answer 15

For the first one, you went from a smaller shape to a bigger shape, so the scale factor has to be more than 1, which eliminated 3/5 and 9/25.

Answer 16

make sense?

Answer 17

yes

Answer 18

ok, now try the third one with the trapezoids

Answer 19

ok it will take a sec

Answer 20

ok

Answer 21

oh whats the equation

Answer 22

There's not really a set equation, and I'm kind of wary of making one up, but here goes.

When going from BIG to SMALL.
\[scale~factor=\sqrt{\frac{ A_{smaller} }{ A_{bigger} }}\]

When going from SMALL to BIG
\[scale~factor=\sqrt{\frac{ A_{bigger} }{ A_{smaller} }}\]

Answer 23

\[\frac{ 82 }{ 21 } = t ^{2}\]

Answer 24

82/ 21= 3.9 = 4

Answer 25

The picture you have up is showing 84 instead of 82.

Also, you did it in reverse. It says transform HIJK (bigger) into LMNO (smaller), so it should be \[t^2=\frac{ 21 }{ 84 }\]

Answer 26

oh then let me recalculate

Answer 27

so then it would be 1/4

Answer 28

yes

Answer 29

i have 3 other question do you mind?

Answer 30

ok

Answer 31

well how would you do this its different from the other questions

Answer 32

It's not really different. You're going to use the same formula to solve for the missing area.

\[t^2=\frac{ A_{bigger} }{ A_{smaller} }\]
\[\left( \frac{ 5 }{ 2 } \right)^2=\frac{ A }{ 36 }\]

Answer 33

umm i dont even know where to start

Answer 34

lol x.x

Answer 35

375/`135

Answer 36

start on the left. square the 5/2
then multiply by 36

Answer 37

damn why did i go to this post...now i gonna get notifications for dayz.... -cries-

Answer 38

@chosweenmatt, it was the same reason I did... https://www.youtube.com/watch?v=N62OoNbXOIo

Answer 39

somehow i got 100