R.2

Find the Missing Side

Q4 · Apr–Jun

Use the area or the perimeter and one side to find the other side of a rectangle.

Level
Medium
Problems
Daniel Math Academy · Grade 5 Math

Find the Missing Side

Skill R.2 · Area, perimeter & volume · ★★☆ Medium · Quarter 4

Name
 
Date
 
Score/ 6

Find each missing side. Include units.

Example
12 in?Area = 96 in²
? =8 in

Think: Work backward: divide the area by the length, . For a perimeter, take half of it and subtract the length.

  1. 1
    19 ft?Area = 209 ft²
    Find the missing side. 
  2. 2
    20 m?Area = 300 m²
    Find the missing side. 
  3. 3
    11 cm?Area = 99 cm²
    Find the missing side. 
  4. 4
    12 cm?Perimeter = 42 cm
    Find the missing side. 
  5. 5
    19 in?Perimeter = 72 in
    Find the missing side. 
  6. 6
    17 ft?Area = 68 ft²
    Find the missing side. 
Daniel Math Academy · danielmath.comWorksheet #gar45mt · Page 1 / 2
Daniel Math Academy · Grade 5 Math

Answer Key

R.2 Find the Missing Side · ★★☆ Medium

  1. 111 ft
  2. 215 m
  3. 39 cm
  4. 49 cm
  5. 517 in
  6. 64 ft
Daniel Math Academy · danielmath.comWorksheet #gar45mt · Answer Key · Page 2 / 2