Question

HELP MEDAL & FAN LAST Q OF TONIGHT!

Answer 1

Ok what is the difference between the centers?

Answer 2

http://www.mathwarehouse.com/geometry/circle/images/equation-of-circle/general-formula-equation-of-circle.png

Answer 3

Would it be 113? @ adamaero

Answer 4

How did you get that answer?

Answer 5

-3-4^2 + 1-9^2

Answer 6

I remember seeing that formula you showed me.

Answer 7

You need two equations (for each circle).

Answer 8

There may be a more straightforward way, but I haven't thought of it.

Answer 9

Can you give me an idea of what I need to do?

Answer 10

I'll foil it out, but I'm not sure that I'm guiding you down the right path anyway...

Answer 11

I took the test, how I did it was by translation. Remember, these are word problems and math problems.

What is the translation difference between the two?

Answer 12

do you have the answers? or was that way back

Answer 13

is there a formula for translation difference?

Answer 14

@ybarrap

Answer 15

It was my semester exam too, I had to get an extension.

No just plain translation, graph it.

How far would it be across the board? In units, aka "I translated A up 4 units and across by 2"

Answer 16

Yeah I had to get an extension as well and I have 20 minutes to finish these questions.

Answer 17

less than

Answer 18

so I have to figure out how many units across the y and x it translated?

Answer 19

Ok mine was translated to the left and upwards. Explain the difference.

Then what is the difference in dilation? Explain that difference.

Answer 20

what is dilation?

Answer 21

Expansion of an object. Primarily circles.

Answer 22

So what the explanation needs to be is something along the lines of "I proved they were similar by translating _________ and I dilated it ______"

Make sense?

Answer 23

not really I get what you mean by dilation but doesnt similar mean the same angles?

Answer 24

Yes, its just larger.
A radius of 4 can be dilated to 1/4 aka 1.

So what you need to do is find the difference in location of the center point.

Answer 25

from circle c to circle e right?

Answer 26

What is the difference in units of (-3, 1) and (4, 9)? Go X axis first, then Y axis.

Then what is the dilation difference?

And yes, either way it works.

Answer 27

7 and 8 right?

Answer 28

or is it -7 and 8

Answer 29

Yes, explain it by saying something like "I translated it to the right by 7 on the x-coordinate, moving it from -3 to 4"

For example of what you did.

Answer 30

and upwards 8 right?

Answer 31

Yes.

Its to the right by 7 then upwards by 8 I think. Word it out.

Then the dilation is 4, what is 3/4 of four?

Answer 32

3?

Answer 33

.75

Answer 34

Yes. That is your answer. Word it out.

Answer 35

3 or .75

Answer 36

@RhythmicTune

Answer 37

Something like "I proved they were similar by moving Circle C to the right by 7, moving -3 to 4. I then moved it upwards by 8...(fill in similar to first half here).. The dilation difference is 3/4.

Answer 38

Its 3 not .75

Answer 39

okay

Answer 40

I said it by saying one can be translated to the other then dilated.

Answer 41

thanks so much dude

Answer 42

Your welcome. Stay frosty.