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# Unit 8: Volume and surface area

Volume and surface area help us measure the size of 3D objects. We’ll start with the volume and surface area of rectangular prisms. From there, we’ll tackle trickier objects, such as cones and spheres.

## Volume with fractions

#### Quiz 1

Identify your areas for growth in these lessons:

## Surface area

### Practice

#### Quiz 2

Identify your areas for growth in this lesson:

## Volume of cones, cylinders, and spheres

### Practice

#### Quiz 3

Identify your areas for growth in this lesson:

## Solid geometry

### Learn

• No videos or articles available in this lesson

## Surface and volume density

### Practice

#### Quiz 4

Identify your areas for growth in these lessons:

## Cross sections of 3D objects

### Practice

#### Quiz 5

Identify your areas for growth in this lesson:

## Heron's formula

#### Unit test

Test your understanding of Volume and surface area with these %(num)s questions.