Question

Help with three part question

Answer 1

For part 1:

The centre is the black dot.
You can read the position in x on the horizontal axis
You can read its position in y on the vertical axis

Hint:You will need to assume tha tth ecentre lies on an exact 'integer' i.e. when you read down on th ex axis assume that it lies on one of the check marks


When oyu have don the centre we can look at the radius..

post the (x,y) point of the centre here...

Answer 2

Well the point on the graph is (2,4)

Answer 3

So would that be the center

Answer 4

@MrNood

Answer 5

Hello? =)

Answer 6

yes that is the centre

now go horizontally to tht right of the centre and read the x value of the edge of the circle

Answer 7

5?

Answer 8

Yes - good

So whot is the distance from that point to the centre|?

Answer 9

1? cause 5-4

Answer 10

no - you need to subtract the x value

Answer 11

so 5-2?

Answer 12

yes - so the radius is 3

that is the first part done

Answer 13

so just to confirm for part 1, the center is at (2,4) and the radius is 3 units

Answer 14

yes

And that gives you all the answers fro part 2 as well

Answer 15

Okay r is 3 I know that

Answer 16

h is 2 and v 4?

Answer 17

and it tells you that the centre is (h,v) and you know that is (2,4)

Yes you are correct

Answer 18

then just write thos 3 numbers into the general equation given to you in part 3

Answer 19

so for part 3, would it be (x-2)^2+(y-x)^2=3^2

Answer 20

almost
thre is a small error on your 'y' term'

Answer 21

Well there isn't anything to substitute for my y-term because the values are h,v

Answer 22

I think you may have just made a typo - have a look

you wrote x-h = x-2

do the same for the y-v term

Answer 23

(x-2)^2+(y-4)^2=3^2

Answer 24

well done - that is correct

h is the 'horizontal' and v is 'vertical' position of th ecentre

this is the equation for ALL circles

Answer 25

Thank you so much, I appreciate it.! =)

Answer 26

NP

Just remember - YOU did the work

Have the confidence to use the same methods on other circle questions...