## How do you find the equation of a circle given three points?

Solve the equations, the point S can be found.P = (-6, 5) S = (0, -3)PS is the diameter of the circle.The equation of the circle:(x + 6)(x – 0) + (y – 5)(y + 3) = 0.

## What is the equation of a circle calculator?

How to Use the Equation of a Circle Calculator?Step 1: Enter the circle centre and radius in the respective input field.Step 2: Now click the button “Find Equation of Circle” to get the equation.Step 3: Finally, the equation of a circle of a given input will be displayed in the new window.

## What is the formula for circular?

Formulas Related to Circles

Diameter of a Circle D = 2 × r
Circumference of a Circle C = 2 × π × r
Area of a Circle A = π × r2

## How do I calculate the area of a circle?

The area of a circle is pi times the radius squared (A = π r²).

## How do you find the equation of a circle given two points and a line?

Use the Distance Formula to find the equation of the circle. Substitute (x1,y1)=(h,k),(x2,y2)=(x,y) and d=r . Square each side. The equation of a circle with center (h,k) and radius r units is (x−h)2+(y−k)2=r2 .

## What does the equation of a circle mean?

The equation of a circle is a way to express the definition of a circle on the coordinate plane. If the center of the circle is at the origin of the coordinate plane, the equation is where r is the radius. When the center of the circle is at the point (h,k), the equation becomes .

## How do you find the equation of a line?

The equation of a line is typically written as y=mx+b where m is the slope and b is the y-intercept.

## How do you find the radius of a circle with the center?

The center-radius form is: (x−h)2+(y−k)2=r2 Here, the center point is denoted by (h,k) and r is the radius of the circle. The first example he does is: Find the center and radius of the circle given by the equation (x−2)2+(y+4)2=25.