# Perimeter

Site: | Saylor Academy |

Course: | GKT101: General Knowledge for Teachers – Math |

Book: | Perimeter |

Printed by: | Guest user |

Date: | Sunday, August 4, 2024, 7:17 AM |

## Description

Watch this lecture series introducing the perimeter, and complete the interactive exercises to practice calculating the perimeter of rectangles.

## Perimeter: introduction

Source: Khan Academy, https://www.khanacademy.org/math/cc-third-grade-math/3rd-perimeter#imp-perimeter

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License.

## Perimeter of a shape

## Finding perimeter when a side length is missing

## Finding missing side length when given perimeter

## Practice

### Find perimeter by counting units - Questions

1. Each square on the grid is 1 unit square.

**What is the perimeter of the shaded rectangle?**

________ units

2. Each square on the grid is 1 unit square.

**What is the perimeter of the shaded figure?**

________ units

3. Each square on the grid is 1 unit square.

**What is the perimeter of the shaded square?**

4. Each square on the grid is 1 unit square.

**What is the perimeter of the shaded square?**

### Find perimeter when given side lengths - Questions

1. What is the perimeter of the figure?

_______ cm

2. What is the perimeter of the quadrilateral?

_______ meters

3. One side of a rectangle is units. Another side is units.

**What is the perimeter of the rectangle?**

_______ units

**4. Which of the following expressions can be used to find the perimeter of the rectangle?**

**Choose 2 answers:**

5. What is the perimeter of the rectangle?

_______ meters

6. The length of each side of the star is 8 units.

**What is the perimeter of the star?**

_______ units

7. One side of a regular triangle is 5 units.

**What is the perimeter of the triangle?**

_______ units

### Find perimeter when given side lengths - Answers

1. The perimeter of the figure is centimeters.

2. The perimeter of the quadrilateral is centimeters.

3. The perimeter of the rectangle is centimeters.

4. We can find the perimeter either by adding the lengths of all four sides: