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Mathematics 7 Online
OpenStudy (anonymous):

Circle A has center of (0, 4) and a radius of 6, and circle B has a center of (-3, 5) and a radius of 24. What steps will help show that circle A is similar to circle B? (5 points) Select one: a. Translate circle A using the rule (x+3, y-1). b. Rotate circle A 180° about the center. c. Dilate circle A by a scale factor of 4. d. Reflect circle A over the line y=x.

OpenStudy (anonymous):

@RadEn

OpenStudy (anonymous):

@ganeshie8

OpenStudy (anonymous):

@hartnn

OpenStudy (nincompoop):

if they have the same radius length, then they are identical though similarity can also mean proportionality so start with by identifying radius in circle A is proportional to radius in circle B

OpenStudy (anonymous):

ok so what is the answer

OpenStudy (nincompoop):

I am not going to give you the answer I gave you pretty much what you need to know

OpenStudy (anonymous):

ok i think its B actully maybe not

OpenStudy (anonymous):

am i correct

OpenStudy (anonymous):

can you draw it for me

OpenStudy (nincompoop):

you do it

OpenStudy (anonymous):

thanks helper

OpenStudy (anonymous):

@LastDayWork

OpenStudy (nincompoop):

you're welcome you don't even need to draw anything if you can multiply and divide it should be obvious

OpenStudy (anonymous):

ok really thnxs:)

OpenStudy (nincompoop):

what is the formula for the area or perimeter of a circle?

OpenStudy (anonymous):

finding the area for

OpenStudy (anonymous):

like what shape

OpenStudy (nincompoop):

CIRCLE

OpenStudy (anonymous):

ok its pir^2

OpenStudy (anonymous):

pi r^2

OpenStudy (nincompoop):

so if you applied pi * r^2 to circles A and B you will notice that the area is dependent on the value of the radius because pi is a constant

OpenStudy (anonymous):

so what

OpenStudy (anonymous):

do i do with the two circles after i plug in the stuff for it

OpenStudy (nincompoop):

Circle B is a multiple of Circle A identify how much multiple

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

how do i figure that out

OpenStudy (nincompoop):

you're not really plugging anything how many six are there in a twenty four?

OpenStudy (anonymous):

4

OpenStudy (anonymous):

i think

OpenStudy (nincompoop):

try to multiply 6x4 =?

OpenStudy (anonymous):

24

OpenStudy (nincompoop):

now to dilate means to widen and you are widening shapes by factors

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

are there any answers we can cancel out though

OpenStudy (nincompoop):

so how much bigger is Circle B compared with circle A?

OpenStudy (anonymous):

see i told you it would be easier to graph it

OpenStudy (nincompoop):

you don't need to AREA of a circle is DEPENDENT on the LENGTH of ITS RADIUS so you're focusing on the radius if 24 is a factor of 6 then by how much that should give you EVERYTHING you need to know to answer the problem

OpenStudy (anonymous):

I just didnt want to say i dont know but i really dint know how much bigger it is

OpenStudy (nincompoop):

okay calculate the area of circle A and B then then figure out how much one is bigger than the other

OpenStudy (anonymous):

what would be the radius.. can you at least give me that

OpenStudy (nincompoop):

READ your PROBLEM

OpenStudy (anonymous):

OK i got it all circle b is bigger than circle A

OpenStudy (anonymous):

@eliassaab @ikram002p

OpenStudy (anonymous):

can you tell me what it will be

OpenStudy (anonymous):

i think its C am i correct

OpenStudy (ikram002p):

all circles are semiller -.-

OpenStudy (anonymous):

is there a possible answer

OpenStudy (ikram002p):

a. Translate circle A using the rule (x+3, y-1).

OpenStudy (anonymous):

i knew it thank you can you help me with some more please

OpenStudy (anonymous):

ill post it and tag you

OpenStudy (ikram002p):

ok , ill see

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