Question

Find the radius of circle with center at origin and passing through (0,-3)?​

Answer 1

Answer:

The radius of the cicle is 3 units

Step-by-step explanation:

We have to find the radius of circle whose center is at origin i,e. The co-ordinate of the center is (0,0) , and the circle passes through a point whose co-ordinate is (0, -3)

Now, we know that the length of the radius of a circle is the distance between the center and a point which lies on the perimeter of the circle

So, the length of radius of the circle whose center is at (0, 0) and a point (0, -3) which lies on the circle is = √((0-0) ^2+(0-(-3)) ^2)

=√(0+(0+3) ^2) =√3^2=3 units