Question

If the point p (2 4) lies on circle , whose centre is c (5,8), then the radius of circle is

Answer 1

Answer:

Step-by-step explanation:

since the point p lies on the circumference and pont c is the centre of the circle,on joining the points we get the radius

therefore by using the distance formula,

$\sqrt{(x2-x1)^{2}+(y2-y1) } =radius\\\sqrt{(5-2)^{2} +(8-4)^{2} } =radius\\\sqrt{3^{2}+4^{2} }=radius\\ \sqrt{9+16} =radius\\\sqrt{25}=radius\\radius=5 units$

Hope it helps you