# Lesson 15 Find Missing Side Lengths

Let’s use the relationship between multiplication and division to solve problems.

## Warm-up Estimation Exploration: The Garden

What is the area of one of the large rectangles in the garden?

Record an estimate that is:

too low | about right | too high |
---|---|---|

## Activity 1 Find the Missing Side Length, Part 1

Complete the table.

area | length | width |
---|---|---|

## Activity 2 Find the Missing Side Length, Part 2

## Problem 1

Complete the table:

volume | base | height |
---|---|---|

## Problem 2

Clare wants to find the height of a rectangular prism with the following measurements:

volume | length | width | height |

First, Clare finds the quotient

. What could she do next to find the height? Find the missing height to finish the problem for Clare.

## Problem 3

Complete the table.

volume | length | width | height |
---|---|---|---|

## Practice Problem

## Problem 1

The area of a rectangular field is 8,320 square yards. The width is 65 yards. How long is the field? Explain your reasoning.