## What is an equation of a circle with the center 7 and radius 4?

Equation of circle = (x-h)^2 + (y-k)^2 = r^2, where (h,k) is center and r is radius. center here (h,k) = (7,-2) and r = 4. plug in those numbers to get equation of circle.

## What is the equation of a circle with a radius of 7 and a center at 4 3 )?

Question: The standard equation of a circle with center (-4,3) and radius 7 is A (x – 4)2 + (y + 3)2 = 7 B (x – 4)2 + (y + 3)2 = 49 c)(x + 4)2 + (y – 3)2 = 49 D (x + 4)2 + (y – 3)2 = 7.

**How do you write the standard equation of a circle?**

The standard form of a circle’s equation is (x-h)² + (y-k)² = r² where (h,k) is the center and r is the radius.

### What is the general form of the equation of a circle with a center at a B and a radius of length M?

The general form of the equation of a circle with center at (a, b) and radius of length m is x2 + y2 – 2ax – 2by + (a2 + b2 – m2) = 0.

### What is the formula to find the radius of a circle?

Therefore, the radius of a circle is CP. By using distance formula, (x-h) 2 + (y-k) 2 = CP 2. Let radius be ‘a’. Therefore, the equation of the circle with centre (h, k) and the radius ‘ a’ is, (x-h) 2 +(y-k) 2 = a 2. which is called the standard form for the equation of a circle. Equation of a Circle in General Form

**How do you find the equation of a circle with center?**

The equation of circle with (h,k) center and r radius is given by: (x-h) 2 + (y-k) 2 = r 2. Thus, if we know the coordinates of the center of the circle and its radius as well, we can easily find its equation. Example: Say point (1,2) is the center of the circle and radius is equal to 4

#### What is the standard form of the circle equation?

Standard form of circle equation is (x – a) 2 + (y – b) 2 = r 2 Substituting the values of centre and radius, (x – 2) 2 + (y – 3) 2 = 1 2 x 2 – 4x + 4 + y 2 – 6y + 9 = 1

#### What is circcircle equation formula?

Circle equation formula refers to the equation of a circle which represents the centre-radius form of the circle. To recall, a circle is referred to a round shape boundary where all the points on the boundary are equidistant from the centre. An equation is generally required to represent the circle.