Circle

Click here for EXAMPLE 2 EXAMPLE 1: Find the center and radius of a circle  (x – 1)² + (y – 4)² = 16 SOLUTION:… Read More »How to Find Center and Radius from Equation of Circle (e.g 1)

QUESTION: What is the radius of a circle whose center is at C(-1, 3) passing through point P (7,11)? SOLUTION: Here center C = (a, b)… Read More »How to Find Radius of a Circle by its Center and any point on it

QUESTION: The area of a circle is 616 cm². What is its diameter? SOLUTION:   Area of a circle = $\frac{\pi (d^2)}{4}$ where d is the… Read More »How to Find Diameter of a Circle if its Area is given

QUESTION: A circular lawn is surrounded by a path of uniform width of 7 meters. The area of the path is 21% that of the lawn.… Read More »How to find Area between two Concentric Circles

How to find the Equation of a Circle if the coordinates of its center and the length of its radius are given. Click here for EXAMPLE… Read More »How to find Equation of a Circle by its Radius and Center (e.g 2)

 Formulas of Area and Perimeter of a Circle and Semi-Circle   AREA: The Area of a Circle can be found either by its radius or diameter.… Read More »Area and Perimeter of a Circle and Semi-Circle

How to find the Equation of a Circle if the coordinates of its center and the length of its radius are given. Click here for EXAMPLE… Read More »How to find Equation of a Circle by its center and radius (e.g 1)

 QUESTION: What is the equation of a circle passing through the points (0,0), (-5,4) and (6,10)? SOLUTION: As we know, the general equation of a circle… Read More »How to find Equation of a Circle by its three points