Question 66

What is the equation of a circle with centre of origin and radius is 6 cm?

Solution

Given,

Center of the circle = (0,0)

Radius of the circle (r) = 6 cm

$$\therefore\ $$Equation of the circle is $$x^2+y^2=r^2\ $$

$$=$$> $$x^2+y^2=6^2\ $$

$$=$$> $$x^2+y^2=36$$

$$=$$> $$x^2+y^2-36=0$$

Hence, the correct answer is Option C

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