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?

picture of a garden with large rectangular lawns

Record an estimate that is:

too low

about right

too high

Activity 1 Find the Missing Side Length, Part 1

Complete the table.

area
(square feet)

length
(feet)

width
(feet)

Activity 2 Find the Missing Side Length, Part 2

Problem 1

Complete the table:

volume
(cubic feet)

base
(square feet)

height
(feet)

Problem 2

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

volume
(cubic feet)

length
(feet)

width
(feet)

height
(feet)

  1. First, Clare finds the quotient . What could she do next to find the height?

  2. Find the missing height to finish the problem for Clare.

Problem 3

Complete the table.

volume
(cubic feet)

length
(feet)

width
(feet)

height
(feet)

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.