Question

Find the equation of the circle below

Answer 1

x² + y² = 16

Explanation:

the circle has its centre at the origin (0, 0 )

the equation of a circle centred at the origin is

x² + y² = r² ( r is the radius )

the radius r of the circle is 4 , then

x² + y² = 4² , that is

x² + y² = 16