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OpenStudy (anonymous):
OpenStudy (anonymous):
can someone help ?
OpenStudy (anonymous):
The equation of a circunference is :
(x-a)^2+(y-b)^2=r^2
where : (a,b) are the coordinates of the center of the circunference and r is the radius
you can find a,b and r in the graphic
OpenStudy (anonymous):
is it (x-1)^2+(y-4)^2=r^2
?
OpenStudy (anonymous):
the coordinate of center is : (-1,4) no (4,1), and for radius you can check any distance from center to any point of the circunference
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OpenStudy (anonymous):
so its (x – 4)2 + (y + 1)2 ?
OpenStudy (anonymous):
and radius 7 ?
OpenStudy (anonymous):
first is right
but for radius , can you check how many squares there are between the center and the top (or bottom) of the circumference?
OpenStudy (anonymous):
i got 7
OpenStudy (anonymous):
now 9
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OpenStudy (anonymous):
9 squares between the center and the top of circumference?
OpenStudy (anonymous):
the center is the blue point
OpenStudy (anonymous):
ohhh the squares from the center to the bottom ? 2
OpenStudy (anonymous):
i see 2 and half
OpenStudy (anonymous):
so thats the radius ?
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OpenStudy (anonymous):
yes
OpenStudy (anonymous):
but that isnt a option.
OpenStudy (anonymous):
:o
what is your final answer you got?
OpenStudy (anonymous):
(x – 4)2 + (y + 1)2 = but idk the radius
OpenStudy (anonymous):
2,5
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OpenStudy (anonymous):
idk , ill ask someone.
@satellite73 .
do you know how to do this ?