In this week’s post, we will look at cylinders. Have you heard of them? Do you know what they are? Do you know their characteristics? We will talk about all of this below.

**What are cylinders?**

Cylinders are geometric solids that are formed by a rectangle rotating about one of its sides.

**How are cylinders formed?**

##### A cylinder is formed by a rectangle, which is the side of the cylinder and two circles, which are the two bases of the cylinder.

**What are the parts of the cylinder?**

- The
**axis**is the side of the rectangle that remains fixed in rotation. - the
**bases**are the two circles, perpendicular to the axis. - The
**height**is the distance between the two bases. - The
**radius**(r) is the length from the axis to the side of the cylinder. It corresponds to the radius of the base.

**How is the area of a cylinder calculated?**

You first have to find the area of each part of the cylinder and then add them.

**Area of the rectangle = 2πrh**

**Area of the base = πr ^{2}**

Adding all parts of the cylinder, we get the area = 2πrh + 2πr

^{2}

**Area = 2πr(h + r)**

**How is the volume of the cylinder calculated?**

The volume is equal to the area of the base multiplied by the height:

**Volume = πr ^{2}h**

If you want to learn more elementary math, you can try Smartick for free.

### Learn More:

- Learn the Associative Property of Multiplication
- Learn the Properties of Geometrical Prisms
- Commutative Property in Multiplication and Addition
- Learn about the Distributive Property of Multiplication
- How to Calculate Perimeters: Part 1

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