The equation for the circle below is x² + y2 = 16. What is the length of the circle's radius?
2 answers:
Answer:
radius = 4
Step-by-step explanation:
Recall that the equation of a circle centered at (0,0) on the plane is given by the formula:
where "r" is the radius of the circle.
S, in our case, since the equation reads:
16 corresponds to the square of the circle's radius. Therefore the radius can be found via:
and since we are talking about the length of a radius, we choose the positive option for the answer: radius = 4
You might be interested in
1) find slope. when its perpendicular, It will be a negative reciprocal to the given slope so m1= -1/m1
m=-1
2)
y =-1x+b
(-3)=-1(2)+b
-3=-2+b
b=-1
3) y=-1x-1
hope I helped!
m=-1
2)
y =-1x+b
(-3)=-1(2)+b
-3=-2+b
b=-1
3) y=-1x-1
hope I helped!