Functions question (1 Viewer)

[tillsydillsy22]

Hi, i was just wondering how do you find the radius of a circle when just given the centre and a point that it passes through??
e.g.
find the radius of each circle:
a) centre (-2,5), passes through the point (6,11)

i'm so stuck!!
I tried working backwards but failed mmm

 

[Timothy.Siu]

u can find the distance from the centre to the point, because that will be the radius.

For a circle, any distance from the centre to any point on the circle is the same, which is the radius. =)

so u can just use the distance formula.

 

[tillsydillsy22]

ah yes, thanks!!
xxx

 

[Timothy.Siu]

ah yes, thanks!!
xxx

you're welcome. good luck.