## How do you find the surface area of a sphere?

And the formula for the surface area of a sphere of radius R is 4*Pi*R2.

## How do you find the radius of a sphere when given the circumference?

Use the formula C/2π. Since the circumference is equal to πD, which is equal to 2πr, dividing the circumference by 2π will give the radius. If you have a sphere with a circumference of 20 m, find the radius by dividing 20/2π = 3.183 m. Use the same formula to convert between the radius and circumference of a circle.

**What is circumference of a sphere?**

The Circumference of a circle or a sphere is equal to 6.2832 times the Radius. Circumference = 6.2832 ⋅ R. C = 2 ⋅ π ⋅ R. Figure 3., Circumference is 2 × π × Radius. The Circumference of a circle or a sphere is equal to 3.1416 times the Diameter.

**How do you find the circumference of a sphere?**

The formula for the circumference C of a sphere of radius r is: C = 2πr.

### What is the volume of a sphere with a circumference of 36?

7776πft3.

### What is the relationship between radius and circumference?

The circumference of a circle is equal to pi times the diameter. The diameter is two times the radius, so the equation for the circumference of a circle using the radius is two times pi times the radius.

**Is the circumference of a sphere the same as a circle?**

Show activity on this post. The circumference is the same in both cases if you don’t assume the circle’s diameter needs to follow the surface of the sphere. However, if you draw the circle’s diameter on the surface of the sphere, it is curved, so the straight (true) diameter is less than the curved diameter.

**What is the surface area of a sphere that is 36?**

Surface area of the sphere =4πr2=4π×9=36π

#### What is the relationship of circumference to area?

The area of a circle is given by the formula A = π r2, where A is the area and r is the radius. The circumference of a circle is C = 2 π r. If we “solve for r” in the second equation, we have r = C / (2 π ). Now we use this to replace r in the first equation: A = π [ C / (2 π ) ]2.

#### What is the relationship between circumference and area?

Step 3: To determine the relationship between the area and the circumference, we solve the equation cx=a c x = a for the value of x . We use the value of x , to describe the relationship. The area is 4 times larger than the circumference.

**What are the formulas for surface area and volume?**

What is the formula of surface area and volume?

Shape | Total Surface Area | Volume formula |
---|---|---|

Cuboid | 2(lb+bh+hl) Where, l = length, b = breadth and h = height | Length x Width x Height |

Prism | ph+2B Where p= perimeter of the base, h = height and B =area of the base | Area of base x Height |

**What does circumference of a sphere mean?**

In sphere. The circumference is the length of any great circle, the intersection of the sphere with any plane passing through its centre.

## Why is the surface area of a sphere 4 pi r 2?

One geometric explanation is that 4πr2 is the derivative of 43πr3, the volume of the ball with radius r, with respect to r. This is because if you enlarge r a little bit, the volume of the ball will change by its surface times the small enlargement of r. which is indeed 43πr3.

## Is area and circumference the same?

The circumference (C) of a circle is its perimeter, or the distance around it. The area (A) of a circle is how much space the circle takes up or the region enclosed by the circle.

**What is the difference between circumference and the area of a circle?**

Sample: The area of a circle and the circumference of a circle are both measurements that depend on the radius of the circle. Circumference is the length around a circle (2Pr) while area is a measure of square units inside the circle (Pr2).

**How do you find the volume and surface area of a sphere?**

Sphere Formulas in terms of radius r:

- Volume of a sphere: V = (4/3)πr.
- Circumference of a sphere: C = 2πr.
- Surface area of a sphere: A = 4πr.

### How do you calculate the surface area of a sphere?

The center is the interior point equidistant to any point of the sphere.

### How to calculate sphere surface area?

“Sphere” – A three dimensional object contained by a surface that has all points at the same distance from the center.

**What is the formula for finding the surface area of a sphere?**

Know the parts of the equation,Surface Area = 4πr2. This nearly ancient formula is still the easiest way to determine the surface area of a sphere.

**What is the total surface area of a sphere?**

Sphere. The surface area (SA) of a sphere can be calculated using the equation: SA = 4πr 2 where r is the radius. Xael doesn’t like sharing her chocolate truffles with anyone.