Before finding out all one formulas, let united state recall what is a circle. Acircle is characterized as the collection of points placed at an equal street from a fixed point in a plane. The resolved pointis referred to as the center of the circle.Radiusis the distance from the facility of a circle come the border of the circle.Let us know all circle formulas using resolved examples.

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## What AreAll circle Formulas?

Parameters likearea,circumference, theradius the a circlecan be calculated making use of allcircleformulas. Differentcircle formulasto calculate different parameters the a given circle have the right to beexpressed as

Circumference of a CircleC = 2 × π × rArea the a CircleA = π × r2Where,

r = radius the the circled = diameter of the circlec = circumference of the circle## List of every Circle Formulas

Given below is the list of every circle formulas because that your basic calculations because that a circle is radius 'r'.

Parameters | Circle Formulas |

Diameter of a one formula | D = 2 × r |

Circumference the a circle formula | C = 2 × π × |

Area the a circle formula | A = π × r2 |

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## Examples top top CircleFormulas

Let us resolve some interesting difficulties using the perimeter of the circle formula.

**Example 1:**Find the area the the circular park who radius is same to 200m.

**Solution:**

To find: Area the a park.**Given:The radius the the park =200 mUsing among the all circle formulas (area the a circle formula),Area the a Circle= π ×r2=π ×2002=π × 40000**

**Answer:** The area that thecircular parkis 40000π m2.

**Example 2:** making use of the perimeter the a circle formula, find the radius that the circle having actually a circumference of 100 in.**Solution: **

**To find: Radius the circle**

**Given: one = 100 in**

**Using perimeter of a one formula,The perimeter of the one or circumference = 2 π r**

**2 π r = 100**

**2 × 22/7 × r = 100**

**r = 100 × 7 / 44 **

**r = 15.909 inch **

**Answer:** Radius of one = 15.909 in

**Example 3: **The radius the a circle is 8in.Using thecircle formula, calculation the circumferenceofthe circle.

**Solution:**

To fine: one of circleGiven: r = 8inThe perimeter of one formula =2πrC = 2×(22/7)× (8)**Answer: The one of a one is 50.28inches.**

## FAQs on one Formula

### What Is the Perimetera Semi-Circle Formula?

The Semi-circleis fifty percent of the full circle. For this reason if the perimeter that the semi-circle formula is 1/2 (2πr) =πr units.

### What Is the Diameterof one Formula?

The diameter that a one formula is identified as twice of a radius.Hence, D = 2r, whereby r is the radius that a circle.

### What Is the Perimeter of one Formula?

The perimeter of the one formulais offered as2 π r,where 'r'is radiusandπ is constant with value (3.14 or 22/7).

See more: How Many Millimeters In One Kilometer S To Millimeters (Km To Mm)

### How To calculate Radius using Circle Formula?

The circumference of the circle formula is given as2 π r. If we know the value of the circumference ofthecircle, then by substituting the valuein the formula we deserve to calculate the radius, 'r'.r = (circumferenceof circle)/2 π.