The radius of the circle whose equation is (x  3)² + (y + 1)² = 16 is
Mathematics
squirtchapman
Question
The radius of the circle whose equation is (x  3)² + (y + 1)² = 16 is
1 Answer

1. User Answers virtuematane
Answer:
The radius of the circle whose equation is (x  3)² + (y + 1)² = 16 is:
4 units.
Stepbystep explanation:
We know that the general equation of a circle with center at (h,k) and radius 'r' is represented by the equation:
[tex](xh)^2+(yk)^2=r^2[/tex]
Here we are given a equation as:
[tex](x3)^2+(y+1)^2=16[/tex]
i.e. on comparing the given equation with the general equation we have
h=3 and k= 1
and [tex]r^2=16[/tex]
on taking square root we get:
[tex]r=4[/tex]
Hence, the radius of the equation is:
4 units