Q7 of 23 Page 230

Find the equation of the circle with centre at the org in and radius 5. Write the coordinates of eight points on this circle.

Radius = 5 units


Equation of circle:


x2 + y2 = 25


Consider x = 0


⇒ y2 = 25


⇒ y = ±5


Again Consider y = 0


⇒ x2 = 25


⇒ x = ±5


Consider x = y


2x2 = 25




Consider x = - y


2x2 = 25




Hence the Eight points are:



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